add binary find in common
move common into util
add Point Class
fix bezier calculate bug
add Point equals method
fix slider length calculate
Merge remote-tracking branch 'origin/master' into muscipular
fix sortObject
fix require path
Merge commit 'b6a604ab327bc115eca281ec83d0d468b1dff2c9'

Conflicts:
	public/js/module/stage/standard.js