Changes from 2.20 to 2.21
added U+FE20-U+FE23 (half diacritics) to Sans (by Denis Jacquerye)
added anchor "half" to position right half of double marks, U+FE21 or U+FE23 to Sans (by Denis Jacquerye)
shifted U+0360 up to avoid collision with some outlines in Sans (by Denis Jacquerye)
added anchor above-mark anchor to U+035D, U+035E, U+0360, U+0361 in Sans (by Denis Jacquerye)
added instructions for ff, ffi, ffl ligatures in Serif Bold (by Євгеній Мещеряков)
added instructions to some N'Ko glyphs (by Wesley Transue)
added instructions to some Lao glyphs (by Wesley Transue)
cleaning up 'liga' Standard Ligature in Latin, in Sans and Sans Mono (by Denis Jacquerye)
added U+046A, U+046B (big yus) in Serif (by Andrey V. Panov)
added box drawing symbols to Sans and Serif (by Lars Næsbye Christensen)
added Makefile to improve font and packages generating (by Nicolas Mailhot)

Changes from 2.19 to 2.20
removed TeX and TeXData tags from all sfd files (by Євгеній Мещеряков)
removed all 'frac' lookups (by Євгеній Мещеряков)
fixed duplicate glyph names (by Євгеній Мещеряков)
removed standard ligatures with U+00B7 in Mono (by Євгеній Мещеряков)
use reference to U+002D in U+00AD in Sans Oblique, and adjust instructions (by Євгеній Мещеряков)
updated Cyrillic in Sans Extra Light (by Andrey V. Panov)
added instructions to N'Ko U+07C1-U+07C6, U+07CA, U+07CE-U+07CF, U+07D1, U+07D3-U+07D4, U+07D8, U+07DB and U+07EB in Sans (by Wesley Transue)
added instructions to Lao U+0E8A, U+0E95, U+0E97, U+EA5, U+0EB4 and U+0EB5 (by Wesley Transue)
adjusted instructions for Hebrew glyphs (by Denis Jacquerye)
added instructions for U+0265 in Sans Bold (by Denis Jacquerye)
fix U+1D68 in Sans: it had the shape of delta, where it should be a rho (by Ben Laenen)
remove U+1D5C glyph in Sans Oblique (it was empty) (by Ben Laenen)
fix instructions of U+01AD in Sans Bold (by Ben Laenen)
fix instructions of U+042D in Serif (by Ben Laenen)
remove buggy instructions of U+2328 in Serif (by Ben Laenen)
corrected width of U+2C75-U+2C76 in Sans Bold and Serif Bold (by Gee Fung Sit 薛至峰)
added U+2C75-U+2C77 to Mono (by Gee Fung Sit 薛至峰)

Changes from 2.18 to 2.19
fixed misplaced symbols (U+2325,2326) in Sans Oblique (by John Karp)
added Mark to Base anchors: 'cedilla' for combining cedilla and 'above-legacy' for stacking above precomposed glyphs (just a,e,i,o,u with macron for now) in Sans (by Denis Jacquerye).
added contextual substitution for Case and Dotless forms in all Sans variants (by Denis Jacquerye).
renamed 'ccmp' lookups for RTL and Basic (LGC, etc.) (by Denis Jacquerye)
added anchor 'cedilla' for vowels in Sans. (by Denis Jacquerye)
extended contextual dotless and case substitutions to handle both below and above diacritics (by Denis Jacquerye)
renamed Dotless and Case Form GSUB lookups in Sans with meaningful names (by Denis Jacquerye)

Changes from 2.17 to 2.18
Re-encoded the source files for Full Unicode (by Ben Laenen)
Re-enabled the "ff", "fl", "fi", "ffl", "ffi" ligatures by default in Serif (by Ben Laenen)
Disabled the "fi", "ffi" ligatures for languages with dotless i in Serif (by Ben Laenen)
added Tifinagh to Sans Book and Bold, U+2D30-U+2D65, U+2D6F, partially hinted in Sans Book. (by Denis Jacquerye)
added Tai Xuan Jing Symbols (U+1D300-1D356) to Sans (by Rémy Oudompheng)
added double-struck letters (U+1D538-U+1D56B minus reserved code points) to Sans (by Gee Fung Sit 薛至峰)
added U+22EE-U+22F1 to Sans (by Gee Fung Sit 薛至峰)
added U+2C67-U+2C6C, U+2C75-U+2C77 to Serif (by Gee Fung Sit 薛至峰)
italicized various glyphs in Latin Extended-B, IPA Extensions, Spacing Modifier Letters, Phonetic Extension (Supplement) and Super- and Subscripts in Serif Oblique fonts (by Gee Fung Sit 薛至峰)
modified outlines, bearings of Hebrew U+05D6, U+05D8, U+05DB, U+05DE, U+05E0, U+05E1, U+05E2, U+05EA in Sans Book and Oblique, adjusted hinting in Book based on Yotam Benshalom's comments. (by Denis Jacquerye)
added Braille Patterns (U+2800-U+28FF) to Serif fonts (by Gee Fung Sit 薛至峰)
added N'Ko to Sans Book and Bold: U+07C0-U+07E7, U+07EB-U+07F5, U+07F8-U+07FA (by Євгеній Мещеряков)
added U+0ED8 (Lao digit 8) to Sans (by Rémy Oudompheng)
added Lao diacritics U+0EB0-0EB9, U+0EBB-0EBC, U+0EC8-0ECD to Mono (by Rémy Oudompheng)
renamed Serif [Bold] Oblique, make it Italic (by Євгеній Мещеряков)
added U+29FA-U+29FB to Sans and Sans Mono (by Gee Fung Sit 薛至峰)
swapped glyphs for Eng U+014A from Sami Eng to African Eng, the latter being more common (by Denis Jacquerye)
swapped ae U+00E6 and ae.alt in Serif Italics fonts, thus fixing #8213 (by Denis Jacquerye)
minor improvements to Misc. Symbols in Sans (by Gee Fung Sit 薛至峰)
minor improvements and additions to Sans ExtraLight (by Gee Fung Sit 薛至峰)
improved instructions for various Cyrillic letters (by Євгеній Мещеряков)
fixed hinting of theta and chi in Sans Book (by Ben Laenen)
added Georgian Mkhedruli to Sans, Serif and Mono, Asomtavruli to Sans and Serif (by Besarion Gugushvili)

Changes from 2.16 to 2.17
Sans fonts: fix position for certain combinations of Arabic fatha, kasra, shadda, damma, kasratan, dammatan, fathatan and hamza (by Ben Laenen)
added 'ae.alt' to Serif Oblique fonts, with design matching shape of italic 'a' instead of slanted 'a', see bug:8213 (by Denis Jacquerye)
added super- and subscripts to Serif and Mono: U+1D2C-U+1D2E, U+1D30-U+1D3C, U+1D3E-U+1D42, U+1D62-U+1D65, U+1D78, U+2071, U+207A-U+207E, U+208A-U+208E, U+2090-U+2094 (by Gee Fung Sit 薛至峰)

Changes from 2.15 to 2.16
fixed hinting instructions for digits in DejaVu Sans Oblique, Bold Oblique, and Serif Book to not change glyph width (by Євгеній Мещеряков)
added instructions for U+0404, U+0411, U+0413, U+0414, U+0417-U+041B, U+041F, U+0423, U+0424, U+0426-U+0429, U+042C, U+042E, U+042F, U+0490 in Serif Bold (by Євгеній Мещеряков)
added U+0220 and Eng.alt to Serif fonts (by Denis Jacquerye)
added U+232C, U+2394, U+23E3 to Sans fonts (by John Karp)
added U+230C-U+230F, U+231C-U+231F to Sans fonts, fixing bug:9547 (by John Karp)
adjusted dot below, dot above, dieresis above, dieresis below in Sans fonts (by Denis Jacquerye)
added U+2300, U+2301, U+2303, U+2304, U+2305, U+2307, U+2326, U+2327, U+232B, arrow.base to Sans fonts (by John Karp)
adjusted dot and dieresis below and above in Serif fonts (by Denis Jacquerye)
added U+1E1C-U+1E1D to Serif fonts (by Denis Jacquerye)
added U+22BE, U+22BF (by Wesley Transue)
added U+2324; modified U+2325: more standard proportions, and matches U+2324 and U+2387; added U+2387 : flipped U+2325 with standard arrowhead (by John Karp)
added Lao digits U+0ED0-0ED7, U+0ED9 (by Rémy Oudompheng)
added to Mono in Arabic block : U+060C, U+0615, U+061B, U+061F, U+0621-U+063A, U+0640-0655, U+065A, U+0660-066F, U+0674, U+0679-0687, U+0691, U+0692, U+0698, U+06A1, U+06A4, U+06A9, U+06AF, U+06B5, U+06BA, U+06BE, U+06C6, U+06CC, U+06CE, U+06D5, U+06F0-06F9 (by Rémy Oudompheng)
added to Mono in Arabic Presentations Forms-A : U+FB52-FB81, U+FB8A-FB95, U+FB9E, U+FB9F, U+FBAA-FBAD, U+FBE8, U+FBE9, U+FBFC-FBFF (by Rémy Oudompheng)
added to Mono in Arabic Presentations Forms-B : U+FE70-FE74, U+FE76-FEFC, U+FEFF (by Rémy Oudompheng)
added U+05BA, U+05BE, U+05F3, U+05F4, U+FB1E, U+FB21-U+FB28, U+FB4F to Sans (by Євгеній Мещеряков)
added U+2102 to Mono (by Євгеній Мещеряков)
added U+2983-U+2984 to Sans (by Gee Fung Sit 薛至峰)
added U+2A2F to Sans, Serif and Mono (by Gee Fung Sit 薛至峰)
added U+2373-2375, U+237A to Sans (by John Karp)
converted kern pairs to kern classes with Tavmjong Bah's scripts (by Denis Jacquerye)
set ScriptLang of kerning classes to just latn because of Pango bug (by Denis Jacquerye)
added DNK to ScriptLang latn otherwise it is excluded, and SRB and MDK to cyrl (by Denis Jacquerye)
removed flag 0x80 in generate.pe, otherwise it generates kerning tables some systems don't like; thus loosing Apple tables (by Denis Jacquerye)
removed ligature for precomposed legacy characters of Sans Oblique fonts (by Denis Jacquerye)
added bearings to en dash U+2013, em dash U+2014 and figure dash U+2012 by making dashes shorter, preserving character width (by Denis Jacquerye)
reduced U+031C, U+0325 (ring below), U+0339 to be entirely visible; added instructions in Sans Book; changed U+1e00-U+1e01 to use new ring below (by Denis Jacquerye)
adjusted circumflex below on U+1E12-U+1E13, U+1E18-U+1E19, U+1E3C-U+1E3D, U+1E4A-U+1E4B, U+1E70-U+1E71, U+1E76-U+1E77 in Sans fonts (by Denis Jacquerye)
Added U+0ED4, U+0ED5 to DejaVu Sans (by Rémy Oudompheng)
Lao-specific anchors (by Rémy Oudompheng)
added alternate I to match the small capital in Sans (by Gee Fung Sit 薛至峰)