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.
Small typo: "refereed" should be "referred".

I quite didn't understand this part: is this just saying that `upstream` will be named `origin` in the local git repository? If that was the case, wouldn't it be simpler to just refer to it as `origin`? (I'm guessing you didn't do that because everyone already refers to it as `upstream`, maybe?)