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
Merge branch 'master' of github.com:justinfrench/formtastic
Merge pull request #885 from dwbutler/master

Add support for Sets and Symbols as collections for collections (check box, radio and select inputs).