Add --until parameter and nodegit upgrade
Notable changes:
- Works with node 4 and 5 versions! Thanks for nodegit fixes.
- 7809e21 Merge pull request #19 from crooy/master
*Add support for--until
parameter - 568bd42 Merge pull request #17 from mrPjer/master
- 30fb8ed Use nodegit to fetch branch names
- e607bad Update nodegit dependency
- a28d5d9 Merge pull request #13 from fabiosoft/master