Simplify multiplexer auto-start tests
[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'
Setup cask http://cask.github.io/ if installed
Update alias to julia, fix cask bin dir location