Fix IfStatement syntax
fix command tools
fix MethodDecl/MethodCall/If grammars in order to enable to parse 'fibo' code.
Merge pull request #36 from tetsurom/IfStmtFix

Great!!
rename Def files
Merge pull request #37 from sekiguchi-nagisa/cmd-fix

fix command tools
Initial Support of Class Definition
Merge pull request #38 from konoha-project/ClassDef

Initial Support of Class Definition