add heroku support
fix start page
Merge pull request #448 from ministryofjustice/feature/heroku

add heroku support
Avoid flakey assign provider tests when testing provider case
Merge pull request #449 from ministryofjustice/patch/tests

Avoid flakey assign provider tests when testing provider case
Move benefits into it's own fieldset
Remove NASS benefits and default to false
Restructure EC details markup