Drop unused project files of libcurl

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

It's not compiling any more and kinda outdated. New stuff should be based on libgit2.

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fix build of Cache test project

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Drop old git index reading test project

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

Signed-off-by: Sven Strickroth <email@cs-ware.de>
RefBrowse: Can pick current branch / detected HEAD as target ref

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