Update copyright year to 2014
Move away from FactoryGirl to factory_girl in docs

Change any references of FactoryGirl to factory_girl for consistency.
Add FactoryGirl.lint to ensure all factories are valid

This commit adds FactoryGirl.lint, which iterates over each defined
factory, builds it, and ensures it is valid. If any factories are
invalid, an exception is raised and includes the names of each invalid
factory.
Update GETTING_STARTED with information on FactoryGirl.lint
Add NEWS entry for 4.3.0 release

Resolves #591
Instructions to include Syntax::Methods in Spinach

Spinach is modular alternative to cucumber. Its gaining popularity these days.
Add Ruby 2.1.0 to .travis.yml
Bump version to 4.4.0