A set of classes to encapsulate details for mounting engines.

Setup for our first engine, pensions calculator, with a pattern that can be expanded for other engines.
Implement the language translation link and alternate meta tags for engines.
Implement correct constraints for the pensions calculator.
Merge pull request #626 from moneyadviceservice/pc-locale-switch

Locale change link and alternate meta tags for engines / pensions calc
Don’t show footer opt out link for feedback pages.
Merge pull request #628 from moneyadviceservice/feedback-opt-out

Don’t show footer opt out link for feedback pages
Remove chat feature toggle
Merge branch 'remove-chat-toggle'
Bump pensions calculator.
rename to use singular for registered repo name
fix typo
customer interactor uses singular namespace
don't lazy load user in tests
extract to use test fixture
Merge pull request #599 from moneyadviceservice/customer-entity

[WIP] [DO DOT MERGE] add customer entity
add cream gem
api change. customer repo now uses User
add cream repository with create
rename method
add user interactor