commitmonitor Code

Since we don't save the urls file every time something changes anymore, save it on exit.

Merge the MultiSCCS branch to trunk and fix some minor merge conflicts.

(Closes issue #163) : Group popups (should wait some seconds for grouping several commits)

convert tabs to spaces.

(Closes issue #234) : Remember last selected project

(Closes issue #205) : Enhancement: Refresh single node

* introduce variable for single url. In the refresh thread, only work on that url if it is set.
* add menu for "check now" to the tree view items which only check that selected item.
* rename "refresh all on next check" to "refresh all".

(Closes issue #189) : Snarl notification
* register CM with snarl
* register three different notification classes

code cleanup:
* rename CRegStdWORD to CRegStdDWORD
* replace the stdstring defing with a typedef for tstring
* get rid of the wide_string typedef, use std::wstring instead

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Add an update notification if a newer version of the CommitMonitor is available.