Clean some whitespace
Revert "Allow import for slideatlas without mongodb"

This reverts commit 46fdad290f912c0db9fe04277f345e87799e24e5.
Require the Flask app to be created explicitly

Simply importing the slideatlas module will no longer implicitly create
a new Flask app. This provides more control over when the app is
instantiated.
Don't attempt to make a database connection when generating documentation

Fixes #42.
Merge branch 'documentation_config'

* documentation_config:
  Don't attempt to make a database connection when generating documentation
  Require the Flask app to be created explicitly
  Revert "Allow import for slideatlas without mongodb"
  Clean some whitespace