Changed all tests from Midje to clojure.test.

This may seem unnecessary, but it will help us in several ways. First,
it's faster to run, which is nice. The tests are more more simple to
read as well. Lastly, this allows us to use tools like cloverage to get
code coverage stats and test.generative to generate random test data.
Remove midje from project.clj
Merge conflict from master
Upgrade MongoDB for good measure
Add more configurability to Swagger output

Datasets can specify their description in the Swagger console.
Change all schema/String references to String
Merge pull request #140 from cndreisbach/swagger-changes

Add more configurability to Swagger output
Merge pull request #141 from cndreisbach/schema-fix

Change all schema/String references to String
Merge pull request #139 from cndreisbach/no-midje

Changed all tests from Midje to clojure.test.