move lineCycleTimer to ExecutablePlugin
implemented bunch of methods exposed to the WebView

- BitBar.resizeToFit()
- BitBar.resetMenu()
- BitBar.addMenuItem("My title")
- BitBar.addMenuItem({"title": "My title"})
- BitBar.addMenuItems([..])
- BitBar.addMenuSeperatorItem()
- BitBar.showMenu()
append BitBar default Preferences MenuItems
added WebInspector support so you can use Safari's Developer Tools to debug HTML Plugins directly