Refactored the helper methods in Record
A draft version of record associations
Introduced Collection
Fixed typos in the Helper spec
Added some Client specs to test the initialization of Collections
Activated Variations inside Families
Added a cassette for testing #show families xxx
Actived Libraries in Families; added a cassette for #show families xxx yyy
Fixed a couple of typos in the Client spec
Tuned Guardfile
Converter/Records -> Converter/Collection
Got rid of a leftover: spec/support/rest_helper.rb
Refactored the helper methods in Record; refactored Converter
Implemented .belongs_to for one-to-one relations
Merge branch 'advanced-object-restful-mapping' into develop