TODO list for Perl module Handel (in no particular order):

    - create sql from SQL::Translator schema scripts
    - add taglib test to check for bogus filter names
    - add sql schema and conversions using SQL::Translator
    - enhance demo sites to use full feature set
    - slim taglib code to remove repeated code blocks left for clarity
    - find translation volunteer other than Google translate
    - clean up cart test variable names
    - add additional cart restore w/filter tests for multiple saved carts
    - devise method for overriding constraints
    - abstract DBI layer to use Class::DBI, DBIx::CDBICompat, or DBIx::Class
