Merge pull request #16 from ministryofjustice/dev-clive

Events according to Heisenberg, change alpha to beta
Minor cosmetic change.
Fixed failing build.
Merge pull request #17 from ministryofjustice/dev-clive

Wrapped design around minimal 404/500 messages
Merge pull request #18 from ministryofjustice/dev-clive

Nasty in-page CSS for error pages. Works though.
Merge branch 'master' of github.com:ministryofjustice/tribunals into dev-clive