few gem updates
Mangopay gem in use and testable in console
Preparations for Mangopay integration
Lot of changes towards Mangopay compatibility
MangoPay payments go through now (but to a fixed wallet only)
Mangopay payments can now go to the right user's wallet
Fix tests
Add payout details to Person model and settings page
Checking and creating the mangopay beneficiary
Change the migration to contain only payment related indexes
- The other earlier indexes here are added in other branch
- This branch wasn't published at the time of change so shouldn't cause trouble
Add MangoPay terms and "Powered by" logos
Make all tests go green (or yellow)
Merge branch 'feature/mangopay' into develop

Conflicts:
	Gemfile
	Gemfile.lock