Message2233

The this a work-in-progress patch where the SimpleNode 
ast tree is replaced with the Python-2.3 ast tree. The 
replacement only covers the CodeCompiler, it does not 
cover jythonc yet.

The new parser/compiler is localted in the p2 and c2 
packages. Eventually these two packages will be 
renamed to parser and compiler.

This is not really a patch but a set of source files 
that must be extracted over a current CVS workdir.