Add sample/heredoc.p4d
Impl <is e>
Fix heredoc.p4d
Add ParsingIs.java
Merge pull request #36 from tetsurom/isImpl

Impl <is e>
refactoring in ParsingContext
Merge pull request #35 from tetsurom/addsample

Add sample/heredoc.p4d
fix output generator
Merge pull request #38 from shun-honda/fixOutputGenerator

fix output