Merge pull request #425 from rjc123/master

Provide suggested link for archive mapping - Treasury Budget 2012
Merge pull request #426 from rjc123/master

Resolve tests for budget 2012
Merge pull request #427 from rjc123/master

New mappings for DEFRA partial transitions and DWP directgov asset discontinuation
Merge pull request #428 from rjc123/master

Revise directgov mappings to include status codes
Merge pull request #429 from rjc123/master

Revise directgov tests to match new mappings
Make default tests' filename host rather than abbr
Merge pull request #430 from alphagov/rake-newsite-host-tests

Make default tests' filename host rather than abbr
Configure defra archive for transition