Directly use function instead of wrapper
Strip the exception header if the cause is an REngineException
Begin also refactor of saving results into GridFS (mongo)
Save and retrieve images from database
Remove marginalia js
Run autodoc
Bump version
Merge branch 'release/0.2'

* release/0.2:
  Bump version
  Remove marginalia js
  Save and retrieve images from database
  Begin also refactor of saving results into GridFS (mongo)
  Strip the exception header if the cause is an REngineException
  Directly use function instead of wrapper