Add a settings page

[ismail-s]

Need to be able to change blog title, theme.

• [x] Create db wrapper that presents settings db table as dict
• [x] Create mapping listing all settings that can be changed
• [x] Add more options to mapping to specify min/max directly there
• [x] Create route and view for displaying settings page
• [x] Create template for settings page
• [x] Handle submission of changed settings
• [x] Upon startup, make sure all settings exist, requesting from command line any that don't
• [x] Change settings usage in rest of web app to use settings dict
• [x] Make sure both templates work
• [x] Remove unnecessary settings in ini files
• [x] Make sure all settings we want in settings webpage are in settings webpage
  • [x] Add fireblog.recaptcha-secret setting
  • [x] Add fireblog.theme setting
  • [x] Add Persona settings
• [x] Remove any redundant code
• [x] Tests...

[ismail-s]

So far, I've added a settings class thing which abstracts the db away, presenting a dict interface. The class also has caching.

[ismail-s]

The main thing remaining now is to update the tests, and add tests for the settings page.

[ismail-s]

Existing tests have been fixed, just need to add new tests and remove redundant code.