Moving design migrations to utils module
Refactoring Design model and DesignMapper, using _sum reduce method definition by default
Simplifying number typecasting to give more expectable results
Reduce method now accepts symbols for quick methods
Fixing issue when typecasting numbers from strings with no number
Adding CastedArray#insert method, and cleaning some Migration stuff
Merge branch 'master' of github.com:couchrest/couchrest_model
Merge branch 'master' of github.com:samlown/couchrest_model
Started on specs for design migrations
Updating gem dependencies to support Rails 4
Supporting Rails 4.0