Differentiate thread result codes

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
TGitCache: Include result code in Debug String

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Drop commented code

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Refactor TGITCache.cpp

Based on TortoiseSVN revision 20910

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>