fix typo
Show studies sorted by their name

- Rather than sorting them by creation time
- Making it easier for the user to find the study they are looking
Move question method from user to Note

- Its a scope method so it doesn't belong on User but on Note
Refactor finding neglected studies

- Move the query method onto Study. Thats where it belongs.
- Extract and rename some methods after moving the query.
- Add integration test for assuring that the feature works.
Remove dead code

- User#techniques_as_hash used to used for rendering a users techniques
  as json, but feature has been removed. This code should also have been
  removed.