Update git intro

[PythonCHB]

Make sure it focuses on the workflow we need for class.

[PythonCHB]

The page in the Resources repo needs a lot of help, too.

-CHB

[PythonCHB]

@codedragon: Is this in good-enough shape to close this?

[codedragon]

I was going to say yes, but I read feedback from the class that it wasn't very good, so I'm going to take another look and find ways to improve it.

[PythonCHB]

Great!
One suggestion is to have, in the "PythonResources" repo, a compact set of instructions for getting setup for the class. and the basic workflow.

Also, I just saw a note in a intro to gitHub class presentation:

https://s3.amazonaws.com/cds-cda/GitHub_Mar2016/Data+Academy-+Git+and+Github.pdf
(Dept of Commerce Data science series):

"... gitHub for Windows. It includes a a command line version of git as well as the GUI. It works well with Powershell, and sets up solid credential caching and same CRLF settings"

maybe a good options for out students?