Add database and data

Update travis config and readme.
Connect to db

Use a factory to get the correct database connection to support multiple backends. Test db connection in status.
Move holidays out of controller

Hard code data in repostory for now
Create schedules model

Add conversion of string to enum for category parameter.
Add street sweeping

Need to move the query to the config to accomodate other types of databases.
Calculate street sweeping

Um, please fix the way you're doing this. At least add tests.
Fixed failing tests

'Fixed'
Merge pull request #10 from codeforamerica/add-database

Add database