Addedd README

Being new to git, it took me a bit of time to find what 'seemed' the be a good workflow, so I thought I'd document it to help the following:
* bootstrapping new contributors
* working consistently with others
* others get to pick holes in it so I can learn something.

cheers, Ben
I don't think it makes sense to have a git tutorial here. I think you could focus on the important things for this particular repository.