Adding Directgov asset for state pension online

This file is used as a destination by the DWP SPOL service. I've made several changes to the file but this is now the canonical version.
Add back general direct.gov site information pages.

These pages are linked to in several still-live tools and transactions, and should be presented in the same brand as the tools themselves. Includes Terms and Conditions, Personal Information Proteection, Crown Copyright and Help with Linking to DirectGov.
Add back Benefits Adviser disclaimer page
Add back directgov accessibility page
Merge pull request #4 from rjc123/master

Add back assets DirectGov transaction assets removed erroneously