Merge pull request #385 from code-dot-org/staging

11/10/2014 DTT
Merge pull request #389 from code-dot-org/test

11/10/2014 DTP
Merge pull request #391 from code-dot-org/staging

DTT
Merge pull request #392 from code-dot-org/test

DTP
Enable Redis caching of Geocoder results using Elasticache