Merge pull request #7 from Financial-Times/display-text

Model and API support displayText attribute
Merge pull request #8 from Financial-Times/save-for-later

Save for later
Update TODO
Merge pull request #9 from Financial-Times/favourite-vs-favourites

Favourite (singular), Favourites (the whole list)
Merge branch 'master' of github.com:Financial-Times/next-user-preferences-api into history