TabBarController + updated /dist + improvements & fixes

New:

• Added new TabBarController widget.
• Adde new dist files: famous-flex-global.js, famous-flex-global.min.js, famous-flex.js and famous-flex.min.js.
• Added new swipestart, swipeupdate and swipeend events to ScrollController/FlexScrollView.

Improvements:

• Added support for using {animation: null} to disable animations in AnimationController.
• Show mouse-cursor for clickable TabBar items (widgets/styles.css)
• Added suppressWarnings option to CollectionLayout.
• ScrollController/FlexScrollView now uses the more accurate timestamp from the touch/move events when possible.

Fixes:

• Fixed AnimationController not always removing view from render-tree after it was hidden.
• Added missing oldItem property to the tabchange event of the TabBar widget.