Community districts

Hey Chris this is my code for the community district display.

A few things to note.
From the scripts directory:
* You will need to run this command. ```mongoimport -d taxMap -c communityDistricts community.json```
     this will import the community district shapes into the mongodb
* Then run ```node communityDistrictSums.js```
    this will calculate all the district tax totals for taxlots that are in the database. 

*I changed the heroku api back to localhost for the moment.*