fix the output of 'got send -d' upon success
Previous output was: Already up-to-date
New output is: Server has deleted refs/heads/branch
Check this behavour in the related regression test.
add 'got send' command for sending changes to remote repositories
Known to work against git-daemon and github Git server implementations.
Tests by abieber, naddy, jrick, and myself.
Man page additions reviewed by Lucas.
