improved error reporting
add pegjs generator
implements some function to parsing.h
add generateMainFunction and bug fix
Merge pull request #20 from tetsurom/pegjs

Add pegjs generator
implements dump_pego and disposeObject. fixed disposeContext
fixed repetition and some bugs
update CGenerator2 (now can parse json)
Merge pull request #21 from shun-honda/CGenerator2

Update CGenerator2