Changed Rails versions, removed attr_accessible, and changed count to what Rails4 requires
Fixed whitelist_attributes, config.whiny_nils, and config.secret_key_base deprecation warnings
Fixed #find(:all) and Relation#all deprecation warnings
Allowing on the fly precompile for failing Travis test
Merge branch 'rails_4' of https://github.com/bennick/impressionist

Rails 4 compatibility.