2.1-beta 11  (3 Dec 06)
===========
- multi-line parsed literals now make a more sincere effort to track which
  line number a variable was encountered at.
- fixed a bug with multi-line parsed literals where a variable followed
  immediately by a tab or newline was not being "terminated"
- fixed a bug with && and & followed by a HOES expression being mistaken
  for a function reference token.
- added &unlambda function that works exactly like &lambda except it does
  not create a new closure (rather it manipulates the this scope of the
  passed in closure and returns the passed in closure).
- added a profiler to sleep...  I know, you should be scared.  Use the
  DEBUG_TRACE_CALLS (8) or DEBUG_TRACE_PROFILE_ONLY (24) debug options to
  enable it.  Profiler statistics are available in the ScriptInstance class
  with the getProfilerStatistics method.  Scripts can access their profiler
  statistics with the &profile() function which returns an array. 
- fixed a line number skew issue with multi-line tokens passed as parameters
  to a function/expression. 
- fixed a line number skew issue when approximating the line numbers where
  a closure originated.
- added a -a/--ast command line option to dump the abstract syntax tree
  for the specified script. 
- fixed a coroutine bug where consecutive yields happening within a nested
  block were not properly saving the nested context.

2.1-beta 20  (12 Nov 07)
===========
- fix debug mode 24 error handling inconsistency bug.
- $null passed as a Java string now evaluates to null and not ""
- sleep arrays now allow $null elements when converting to Java
  arrays.
- updated fork() to use script name AND line number information
  for thread description.  will aid debugging.
- updated read-only array, hash wrappers to display a warning
  when a script attempts a modifying operation
- updated array, hash wrappers to marshall wrapped types into
  Sleep types as appropriate.