Merge pull request #2 from opentechinstitute/master

Reorganized and augmented readme for clarity; changed gitmodule address...
completes switch to submodules (removes symlinks)
Merge pull request #3 from jnelson/master

completes switch to submodules (removes symlinks)
update submodule pins
Merge pull request #1 from vitriolix/master

fix submodule and build issues on windows