Impl InputManager: string & number base -> number base

Indent InputManager: Indent KEY_XXX

Fix game.js: InputManagerの変更に追随
Fix InputManager: init nowInput(frame count) when keyup is called
Fix InputManager: pushだけでのispushedのテストが失敗する問題を解決
Merge pull request #13 from bitterfox/fox_impl_fix_InputManager

Fox impl fix input manager