Adding commands support to the local streamers.

Change-Id: I9a8b685154e144abf12300b82171fddd640c986d
Added a Toolbar to the Dock

Change-Id: I9f5d4e40bb912f61f786b1f4cd70d050f7995f50
Improved the DockToolbar.

Change-Id: Ib9ba9e625d2c92d09e96e95e776a9e2dc6f68ad8
Refactored the CommandHandler.

Change-Id: I60463b9fae5d787f8e96cb1dea48127d7a6b8595
Daniel's code review

Change-Id: Ie19ce92a399428f7b9486b123b417918391d6512
Merge pull request #39 from rdumusc/openbrowser

Opening a Webbrowser from the Dock