Dev enhancement - Autogenerate git commands and git alias

[sfabrizio]

From @sfabrizio on September 17, 2016 15:56

I'm thinking on that we can create the git commands files and the alias also with one script instead of being creating them by hand. We gonna need a simple config for determinate the command to include in git and his alias.

Copied from original issue: labs-js/turbo-commit#37