Pass empty params from link_to_sort helper when request is POST
Numbers in Columns & Symbolic Sorts
Added symbolic sorts allowing a symbolic sort name to map to a more complex sort expression. For example mapping ip to inet_aton(`ip_address`). Added .watchr file to automatically run tests. Added spec for ActiveRecord to validate order is added.
Updated regex in Sorter.parse_sql to allow numbers in column names.
Add automatic handling of belongs_to association sorting