commitmonitor Code

Revert r748 since D2D in Scintilla causes too many problems, but keep the optimized font settings.

Fix a few /analyze and cppcheck warnings.
(Fixes issue #398) : Cppcheck and /analyze results

Enable Direct2D in the Scintilla control for the diff viewer.

use consistently an empty line between functions

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.

* 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.