Moved DMARC.query into Record.
Use subject.
1.9 hash syntax.
Group parsing rules together.
Convert :uri tags into URI objects.
Use URI.parse.
Coerce DMARC1 into a Symbol.
DMARC1 is now a Symbol.
DMARC1 is now a Symbol.
Coerce any fixed strings to Symbols.
Updated the Record to better represent the current Parser Transforms.

* Instead of using a Struct, just define attr_readers.
FIX ORDER of merge!
Ensure that the fo field is always an Array.
Fixed specs.
Updated the README based on the new parser.
Added an example for using .query.