commitmonitor Code

Fixed issue #121: SegFault of CommitMonitor on Windows Shutdown

* make StopThread() only try to stop the thread, not terminate it forcefully
* if StopThread() can't stop the thread in time, use TerminateProcess to 'shut down'

Add an update notification if a newer version of the CommitMonitor is available.

Indicate the GPL license.

If '/task' is passed on the command line, quit after the update check if there are no updates available.

Set the monitor timer to 60 seconds as planned, since we now can trigger a refresh with the toolbar button for faster testing.
Also make the animation timer slower to 0.4 seconds.

Add option to animate the tray icon for new commits.

Add a button to fetch the latest commits on request.

Add an options dialog.

Don't add new URLs in the thread if in the main dialog an URL was removed.
Without this, there's a race condition if the main dialog removed the URL while the thread is still running, then the thread could re-add the same URL again and 'overwrite' the users choice to remove the URL.

Fix compiler warnings.