Add rethinkdb to server start routine.
Save transactions in rethinkdb
Use config settings for rethinkdb connection
Add user to rethinkdb
Save credit changes to users table
Merge branch 'master' into rethinkdb

Conflicts:
	server.js
very sketchy getAllUsersAsync implementation
Implement everything again with rethinkdb
Fix /users/all
Remove unnecessary modules
Add migration tool
Merge pull request #19 from silsha/rethinkdb

Rethinkdb support