Cal & Sam: Moved /start route into generic route. Fix bug with session leakage in
 feature tests and add claimant_reference_id to the Claimant model.
Cal & Sam: Remove back button from the start page.
Merge branch 'master' of github.com:InsolvencyService/wader into user-facing-paddle

Conflicts:
	rps/beta_claim_forms/routes.py
Merge branch 'master' of github.com:InsolvencyService/wader into user-facing-paddle
Cal & Andy - Fix Feature Test
Merge pull request #211 from InsolvencyService/user-facing-paddle

User facing paddle