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

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

Use the new utility function to find out the installation path of TortoiseSVN.
This solves issue #80.

Indicate the GPL license.

* Use a separate window for the diff viewer. That window has the scintilla edit control as a child window.
* Remember the size of the diff viewer between sessions.

* move the resource.h file into the resources folder
* Implement the diffing of revisions

Implement SVNInfo command.