=== 3.0.0 / 2008-10-22

* 2 major enhancements:

  * Released as its own project, splitting from ParseTree
  * Added Environment to SexpProcessor and built it in. YAY!

* 6 minor enhancements:

  * Allowed CompositeSexpProcessor to be more ducktypey.
  * Refactored Sexp#method_missing into find_node and find_nodes.
  * Removed Sexp#for and other PT specific code.
  * SexpProcessor#process now runs rewriters before everything else.
  * SexpProcessor#rewrite context only for subs, EMPTY for top level rewrites.
  * SexpProcessor#rewrite will stop iterating if the result isn't another Sexp.
