impl most of unimplemented Visit** in JavaScriptSourceCodeGenerator
rename infer to trace
Improve Common Lisp support
Merge pull request #20 from syohex/good-support-common-lisp

Improve Common Lisp support
Add common.green of Common Lisp
Merge pull request #21 from syohex/add-common-lisp-common-green

Add common.green of Common Lisp
commit to merge
Merge branch 'master' of github.com:GreenTeaScript/GreenTeaScript