[Fix #543] Do not set tmux destroy-unattached

Signed-off-by: Sorin Ionescu <sorin.ionescu@gmail.com>
Fix git-info added/deleted count formatting typo

Signed-off-by: Sorin Ionescu <sorin.ionescu@gmail.com>
Merge remote-tracking branch 'upstream/master' into hotfix/upstream/master
Merge branch 'hotfix/upstream/master'
Merge branch 'master' into develop