New DCA/DP flow including git-tfs

Hi Team, maybe it is useful for some other project that have to use Git and TFS together.

@matiasbeckerle, @gkolocsar, @gastonmancini. @jfazzini it is the updated flow to use Git in our projects, it is a simplified version of our previous flow.
Oh, I forgot to link it. Thanks @AlphaGit! 

I am adding some explanation, but you can see https://github.com/MakingSense/git-helpers#ffetch if you need some information now.