Update README.md to include checking out the correct branch
Merge pull request #154 from erictheise/patch-1

Update README.md to include checking out the correct branch
Merge pull request #155 from erictheise/docpad-guides

textile -> docpad conversion of the three getting started files
Major updates to suppor the converted getting started guides.

Fixes #136 - Getting Started
Fixes #137 - Getting Started 2
Fixes #138 - Getting Started 3