commitmonitor Code

* 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

patch from XhmikosR:
bump the copyright year, remove unwanted spaces and convert some tabs to spaces.

convert tabs to spaces.

Fix broken build.

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

Remember the size and position of the diff viewer window.
This implements issue #41.

Indicate the GPL license.

Make ESC quit the diff viewer, if the find window isn't visible.
If the find window is visible, ESC will first close that find window.

ESC closes the diff viewer if the find bar is already gone, otherwise the findbar is closed first.

Make sure the diff viewer can't be made smaller than useful.