add JSON.asString
fix Json.asString API
fix MethodCall TypeChecker
add test
rename package
add package template
update copyright
rename isNodeedErrorMessage => isBlockedErrorMessage
remove unused API and fix MiniVM
rename package and modules
add Syntax.Exception
move Json test
Merge branch 'master' of github.com:konoha-project/minikonoha

Conflicts:
	src/module-devel/TraceVM/TraceVM.c
	src/package-devel/konoha.exception/exception_glue.c
remove old files