Change emparser so it first builds AST and then convert it to EML for the sake of reusability of the parser.
Move em conversion related modules to ecell/emparser
Enable ecell3-sesion to read .em file directly
Implement ecell3-em2python, which converts an em/eml model to a Python script.
Hmm... this doesn't work.
Do not allow fall-through ;)
Merge branch 'feature/ecell3-em2python'