support #integer, #float in c.peg
support typedefs
bug fixed in typedefs
add try statement
update document
add test
update Integer, Float literal
add comments
Merge pull request #26 from imasahiro/fix_python_literal

update Integer, Float literal
Merge pull request #24 from nikuuchi/python2

Append try statement in python.peg
Merge pull request #21 from imasahiro/literal

Support  Context-sensitive Grammar in C.peg