Add React nanodegree

[torrtuga]

Cannot find links to specific courses there.

Link for the React Nanodegree :: https://in.udacity.com/course/react-nanodegree--nd019/

[mikesprague]

Unfortunately, as mentioned in issue #13 (and the project README itself):

NOTE: Only Nanodegree programs with their curricula listed on the Udacity website are part of this list.

I am in no way affiliated with Udacity. I don't have any additional access there. If you don't see the list of courses/links for a particular curriculum then I am unable to as well.

That said, if they do list them at any point I will add them (or feel free to open a pull request if you or anyone else sees they've been added before I do). Cheers!