* remove duplicate includes
* use the right case for includes
* use angle brackets for system headers

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk/src/TortoiseIDiff@24136 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
Use forward slashes in the includes for consistancy. Also remove the double slashes.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk/src/TortoiseIDiff@24144 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
Patch from ch3cooli:
Use proper case for includes

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk/src/TortoiseIDiff@24157 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac