Use %ld instead of %d

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Use evil hack to get (even future) Windows versions

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fix casing and naming of TortoiseGitPlink

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Update years in copyright hints to reflect current state

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Drop unused member variables and code

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Do not write log too early

Signed-off-by: Sven Strickroth <email@cs-ware.de>