Added code to fire show.bs.dropdown event

Any code that relies on the show.bs.dropdown event to load menus would not work. Added one line to fire the event when the menu is shown in hover. This might also deal with issue #32
more event fixes.

Wasn't firing the show event for button groups. Also added hide event.
just put semicolon back.
Merge pull request #35 from VSoftTechnologies/master

Added code to fire show.bs.dropdown event