some changes in the css file
[Alert] a lot of improvements
[PopOver] improved no-rounded corners
[Scrollable] class has been redesigned
[Expandable] some fixes
added font-smoothing on Mozilla
prevent overscrolling on OSX
fixes related to the new version of the Selector.js
[Selectable] class was rewritten
[PopOver] added "scrollable" option
a lot of visual changes