Rename filters partial to properly override spree and add display_name attribute.
Add ability to define filter values as a Proc.
Improved filter configuration to accept Procs returning name/value pairs.
Fix selected check for filters partial.
Order attributes.
Fix using Procs.
Use id based on value.
Fixes pagination.
Merge pull request #18 from jdutil/fix_filters_partial

Fix rendering of filters partial.