Documentation clean-up

[qasaur]

I feel that README.md is currently a little too complex for someone who is using gremgo for the first time, particularly the structure and the code examples. If anybody feels like it, I think the project would benefit greatly from a rewrite of the documentation.

[bobvanluijt]

I'm setting something up with Gremgo, when I've learned a bit more I can make some adjustments and issue a PR.