Refined 'build' task on gulpfile.
Updated generated files.
Merge branch 'master' of https://github.com/OnsenUI/OnsenUI

Conflicts:
	build/docs/en/api/directives/directive/ons-modal.html
	build/docs/ja/api/directives/directive/ons-modal.html
	build/docs/ja/api/directives/directive/ons-split-view.html