Make database name defaulting in mongo more robust.
Support boxen mongodb url for mongo.
Support boxen redis url for redis.
Require latest mongo.

Without forcing at least 1.8 the specs fail because Mongo::MongoClient
doesn’t exist.
Require 3.2 for rails.
Latest exceptional.
More specific env var handling for mong spec.
More specific env var handling for redis.

Also, we dont care what host port, just that we have namespace and
such. Let redis do its thing from the url.
Add script/test.
Add script/bootstrap.
boostrap in test and make test able to run 1 or more spec files.