Merge pull request #3 from pnkz/master

Window Events + Taskbar Items Width
Context menus

Added a plugin for context menus and basic styles. This will be extended
in near future...
A first context menu can be opened by rightclicking on a window's
topbar.
Context menus

- better styles for context menus
- extended jquery.contextmenu.js:
-- added classes how the menu is opened (up or down)
-- customized icon. It will now be added as i element to use with
FontAwesome
- Improved code if pull request #3
Merge pull request #1 from Crease29/master

Merge changes from master