Added test for tree abilities
added build_fields method
Merge branch 'master' of github.com:Supy/studenthub
Added Capistrano support.
Merge branch 'master' of github.com:Supy/studenthub
Added Capistrano gem to Gemfile.
Small changes to Category model validations
Created table for adverts
Created basic Advert model
Improved category rdoc
Fixed typo in adverts field_values
Created validations for Advert and linked to Category
Added code coverage gem
Removed unneccessary validation test
Don't need default values for hash
Added price_type validation
Added validations for advert price and title/description lengths
More Capistrano config.
Merged with Ben's SimpleCov changes.
Fixed validations for advert price_type and defaults