#26 #34 Change Color Scheme

- Add new retina_wood background to all controllers
- Use KGNoise for matte look where appropriate
- Redesign the AddItem/EditItem controllers to be more minimalistic and clean
- Update SettingsViewController with new colors, background,
  matte container and other adjustments
- Add custom bold snell round hand font for Delightful title
- Set some global properties for the design of view controllers
  and tab bar controllers in the AppDelegate