Started mongodb branch to switch from using sql to mongodb

This go driver for mongodb (mgo) is supposed to be really nice... so
hopefully this works out!
made the server provide a little more information on what it's doing
inserting addresses seems to work!
Added function to ensure indicies for addresses exist
Switched over from using raw MongoSession to a DB object

This should allow the end user to specify the database to be used...
instead of just using the default test database