updated Swordfish
[Typeahead] improved li mouseup event callback
[Selectable] new func: clearSelection + close submenus when closing
[PopOver] added new emits + some fixes
[css] buttons in .dark parent + changes in Selectable li elements
[css] modified PopOver background
[Core] improved components Swordfish prototypes
updated Swordfish
[Selectable] improved event handling
[css] modified gradient mask in PopOver arrow
[Selectable] show submenu on mouseover
increased version to 0.2.8 `Navy Blue`
Merge pull request #21 from tsapeta/0.2.x

merge 0.2.x (0.2.8 `Navy Blue`)