Added support for symbols in collections
Added support for set collections
Spec for set collections and symbols in collections
Cleaned up Set support by using the splat operator
Test radio input with sets and symbols
Tests and examples for sets and symbols in radio input
Test using sets and symbols with select input
Compact semantic_form_for class array

If the FormHelper.default_form_class is set to nil then we get extra spaces in the class in the output HTML. This will compact the classes array and knock those pesky nils right out.
Adding rspec for compacting the classes on the semantic_form_for helper
allow to skip attributes when rendering default inputs
added some rspec tests
test against rails 4.0.0
:rubygems is a deprecated source
add Util.rails3?
Model.scoped is deprecated for Model.all in Rails 4
Merge pull request #929 from oldbonsai/patch-1

Compact semantic_form_for class array
Simplify README example

Closes #940
force nokogiri < 1.6 (1.6 requires ruby 1.9.2)
activemodel should be a dev dependency
Appraisable updates:

* always build rails-4 from gem
* build rails-edge from git
* updated gemfiles