Refactor sql_searchable_sortable.rb
comments and Readme
Add ModelSortConfig class to clean up sql_searchable_sortable.rb. UNTESTED
Get tests working again
Merge branch 'feature/clean_up' into develop
Gemify v2.0.1
Merge branch 'master' of https://github.com/jomalley2112/sql_search_n_sort

* 'master' of https://github.com/jomalley2112/sql_search_n_sort:
  Add ModelSortConfig to clean up sql_searchable_sortable.rb. UNTESTED

Conflicts:
	lib/sql_search_n_sort/sql_searchable_sortable.rb