commitmonitor Code

Update all the external libs to the latest version and especially Subversion to the 1.7.x branch.

Make the first pixel use the transparent color.

(Fixes issue #307) : Icons are not transparent on 16-bit color depth systems.

(Fixes issue #310) : CommitMonitor failed to use TortoiseSVN diffs in the case of "c:\Program" file.

Follow-up to r589: Remove obsolete files and adjust the project files.

Patch from XhmikosR:
* Added /MP in all projects, except for OpenSSL which I'm still trying to understand how the makefile is generated. You probably know about it, so adding /MP will speed up a lot the compilation.
* I prefer using /O2 instead of /Ox as per Microsoft's note in msdn.
* I removed some default switches.

If modifying the sys tray icon fails, remove it and add it again just to be on the safe side.

Use _countof() instead of sizeof()/sizeof(TCHAR).

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

* only save the urls file if something important changed during an update check
* do not read the urls file for every update check but create an in-memory copy instead

Closes issue #304