commitmonitor Code

(Closes issue #429) : Allow to dismiss notifications with mouse right click button pressed hover notification ballon

Remove the "using namespace std" statements and explicitly refer to the std namespace where needed.

Use smart pointers for allocating memory and fix a few memory leaks while doing so.
Also replace our custom auto_buffer with std::unique_ptr<>.

Fix compiler warnings for the x64 build.

Delete the popup window in the WM_NCDESTROY handler, not the WM_DESTROY handler since that leads to crashes.

* add an empty line after the license header
* remove unneeded empty lines at the end of files
* use the right case for the includes
* always use <> for system headers
* update ext/Versions.txt

Handle the WM_DESTROY message and clean up there.
Update issue #369

convert tabs to spaces.

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

Make sure that even with IPv6 enabled the CommitMonitor can run on systems earlier than XP.