[iOS] Code refactor
[iOS] Storing all viewController stack instead of just top viewController
Merge branch 'develop' of github.com:usersource/anno into feature/tag-auto-complete

Conflicts:
	anno_app/platforms/ios/UserSource/UserSource-Info.plist
	anno_app/www/anno/pages/community/css/style.css
	anno_app/www/anno/scripts/anno/common/Util.js
Merge branch 'feature/tag-auto-complete' of github.com:usersource/anno into feature/tag-auto-complete