Handle common transaction operations with a service class
Add config for overseas account
Move calculate method to service class
Refactor postage options for registering births and deaths
Allow zero documents for birth and death registrations
Move overseas payments lookup to service class
Update hours for legalisation premium service
Merge branch 'master' into overseas_payments

Conflicts:
	lib/transactions.json
	test/features/pay-legalisation-post.js
Merge pull request #8 from alphagov/overseas_payments

Add overseas payments account for register birth/death service