Add Toggle checked filters in refbrowse dialog

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Support negative ref filter syntax (similar to log filter)

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

Based on TortoiseSVN revision 25878

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

Based on TortoiseSVN revision 25874

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Pass CGitProgressList and git_repository to payload of callback

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Show ref change when using libgit2 to fetch

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Updated libgit2

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Add certificate check dialog

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