Refactor megamind rendering flow, only trigger afterDraw for whole mindmap, not for each canvas

	renamed:    app/assets/javascripts/libraries/labelit.js -> app/assets/javascripts/libraries/notify.js
	modified:   app/assets/javascripts/megamind.js
	modified:   app/assets/javascripts/orangeproton.mindmap.js
	modified:   app/assets/javascripts/orangeproton.notification.js
	modified:   app/assets/javascripts/request.js
	deleted:    app/assets/stylesheets/all/notify.css.scss
Merge branch 'development' of github.com:pse4/orange-proton into development