Updating code base to reflect changes to private model repo (#107)

v1.7.0

 - Data file names now mirror the script names that created the files
 - Features on food inspections are now calculated separately
 - Features on business inspections are now calculated separately
 - The model code merges in the features, does not calculate features
 - Added script to adjust the public sanitarian data to match the schema of the private sanitarian file
 - More aggressive filtering functions
 - Separates out the violation matrix calculation into the parsing step and classification step (which, as it turns out will be useful for the new inspection format)
 - Refactoring model result / evaluation steps to accommodate future analysis


* adding prefix number to code and data, closes #100
* syncing and updating startup script, closes #101
* split violation matrix calculation into two steps, closes #102
* updated help example to remove unused variable
* adding nokey function, needed for new violation matrix calculation
* guard against too few categories in GenerateOtherLicenseInfo, closes 103
* updating filter functions to match model
* starting work described in #104 to split feature creation
* refactoring code for model compatibility
* simplifying initialization

Added CLA link to CONTRIBUTING, added LICENSE file

Merge pull request #11 from Chicago/dev

Implementing optimizations to close #12

Merge pull request #8 from Chicago/dev

Updated to most recent analytics code and tested to successfully run: closes 7, closes 6, and closes 2