Migration from proprietary web service

This is a large update that is not finished.  Among code refactoring
and bug fixes, I am migrating away from the PHP web service I was
building in parallel to this application.  This includes implementing a
social login system instead of using my own login system.  Right now, I
have only implemented Google+ and it’s not fully completed.  I would
like to add Twitter and Facebook in the near future.  I am also moving
away from MySQL and instead, using Amazon’s DynamoDB.
Removed some files that are no longer needed.