Changed the meaning of base_url in Feed
Feed always now returns the first page
Page doesn't require the url to be a URI so get rid of the type conversion
First naive implementation of search by postcode
Can provide multiple postcodes for searching
Handle lodgement date
Simplify handling of options
Will now raise an error if an invalid option is used
Search by last_modified_date
Reinstate ability to go direct to another page from Feed
Sort url parameters so that it gives consistent results for testing on Ruby 1.8