Figures out whether query is an IP address so you don't have to.

Prevents things like: " , ,  , United States".

Show all globally-supported attributes in a table.

Also alias as #province and #province_code.

On input and output (expects/returns lon,lat instead of lat,lon).

Hash order needs to be preserved so with Ruby 1.8 we use a
BSON::OrderedHash instead of a generic one.

Mongoid is not technically an ORM (they call it an "Object Document
Mapper"), and we might support other such storage mechanisms in the
future.

This reduces the desire to use map! (instead of map) which would modify
the user's argument in-place. There's a test to prevent that but this
makes sense semantically too.

Also add extract_coordinates method and use wherever relevant.