Begin organising locale files

- Added configuration of I18n that supports organised file structure
  in config/locales (also did the same in catalog_controller since its
  configuration is done prior to rails I18n load paths being configured)
- Added orders related locale files in separate config/locales/orders
  directory
- Removed unrelated comments from locale files
Fixed I18n issue and begin troubleshooting neosans font issues

- Fixed an I18n issue on orders form.
- Added and included fonts.css.scss containing DTU font definitions.
  These aren't working (in firefox anyway) at the moment and the
  reason for this is still unknown. To be looked into - for now the
  font has been disabled and a standard sans serif is used.