Add linear regression model
Update model debugs to show raw value
Update inventory data XML
Process replacement data
Support new fields in Product model
Support reading and showing replacement products
Add JS to select current page in navbar
Add description text to model selection
Merge pull request #9 from thierer1/dev

Update models and data
Allow users to specify how many weeks back to use data
Add t-distribution model
Correct bugs with stat calculations
Add basic recommendation service
Add average model w/ promo (Sujan's model #1)
Add maximum model w/ promo (Sujan's model #2)
Make num. forecasted weeks a parameter
Merge pull request #10 from thierer1/dev

Add additional models, recommendations, and parameters
Merge pull request #11 from is603fa14/dev

Merge dev into master