Corrected usage example, case-insensitive query

I couldn't get this to work correctly for me with Postgres and ActiveRecord 3.2.8 because I was getting an error:

    undefined method 'offset' in <Array...>

This was because in my `get_raw_records` method I was doing as you suggested in the README:

    def get_raw_records
      User.all
    end

Instead, it should read:

    def get_raw_records
      User
    end

Also, I found stripping whitespace and making the query case-insensitive (with ILIKE) helped the user interface feel more obvious to users.