Put some text in the Guides Readme

Readme for the Guides section initialized with a notation section.

Addresses #15
Put some text in the Guides Readme

The dash - does not show up well in markdown next to the pound/hash #
Moving to X Y Z variable notation

Addresses #15
Merge pull request #23 from RampantArcana/Pre-Release

Put some text in the Guides Readme

Fixes #15