Refactored a bit the Record and Collection converters
Made Collection be Enumerable
Set up YARD
Extended .yardopts; included YARD in the gemspec
Switched to a version of YARD that supports Ruby >= 2.1
Merge branch 'master' into develop

Conflicts:
	README.md
Renamed Record.mapping into Record.dictionary
Pluralized the keys of Record.dictionary
Turned Client into a module; implemented client::Record.all and record.delete
(*_) -> (*)
Fixed bin/typekit-client
Refactored record associations
Refactored the Client’s proxy
Renamed Record into Element; moved Kit, Family, etc. into Resource
Moved Element.identify to Resource.identify
Refactored Element.classify and Helper.tokenize
Moved collection/query to element/query
Refactored Client::Proxy
Added a spec for deleting a kit that does not exist
Implemented Element::Base.find