Be more verbose for git.exe calls

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Try to detect missing-dll exitcode of git.exe

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Use redirection service for special TortoiseGit web pages

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

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

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #1824: Rebase Dialog sometimes not showing after running Fetch and Rebase in Sync Dialog

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