Merge pull request #30 from harbieism/master

Added Population Field back in to Census Data
Merge pull request #31 from harbieism/master

User-defined area based algorithms.
PEP8
Add DC, MD, and VA census data and shapes
Merge pull request #32 from harbieism/dev

Revised parts of the algorithms to get data from user-defined shapes and added tests for them.
Refactor tests to reduce duplicate score_text
Update text when data is not loaded
Merge pull request #33 from jwhitlock/text_updates

Update score_text when data is not loaded
Merge pull request #2 from CivicNinjas/master

Merging changes to CivicNinjas:master