refactor the web playground
move an utility to tool/
rename a test
refactor web compilers
Merge branch 'master' of github.com:jsx/JSX
remove useless casts
fix runtime crash with --optimize unclassify and use of as expressions
make JSX compiler without --release on development
Fix compiler crash

It occurred on compiling SuperKingyoSukui with --release
https://github.com/thaga/SuperKingyoSukui-JSX