add per field clean support
Merge pull request #1 from mgaitan/field_clean

Added field clean support.
Added RelatedItem definition.
Merge pull request #3 from matiasb/related-item

Added RelatedItem definition.
bugfix when the selector isn't. defined.

pq.find('html') doesnt return anything but pq('html') does
one item
Merge pull request #4 from mgaitan/fix_no_selector_defined

Fix when no selector is provided.