Implemented extension bridge support.
Implemented screen sharing for chrome using extension.
Added support to cancel pending getScreen calls.
Added note about Firefox support.
Added support to upgrade/install extension when already running.
Fixed typo.
Added a bunch of classes to topbar buttons.
Added hooks for auto or inline installation of extension.
Moved auto install to chromeExtension service.
Make sure to init chrome extension in all cases.
Updated screen sharing error messages.
Improved top bar on small views.
Merge pull request #77 from longsleep/chromeextension

Chrome extension for screen sharing