AWS DynamoDB support for storing data

[soygul]

• [x] Added integration tests.
• [x] Fixes #110 - Server-helper should use data.seed for seeding the database.
• [x] Local titan -aws command works.
• [x] Fixes #112 - Add test for SetDB, use pointer to interface if necessary to prevent value capture in initPubRoutes.
• [x] Production version deployed to Heroku (connecting to AWS Dyn.).

Accessing DynamoDB from Heroku (aws: us-east) via: http://stackoverflow.com/questions/37483221/can-i-use-dynamodb-through-heroku