fixed database field names to m. instead of md.
db schema for payments
minor refactoring: rename generic validate method to specific currency method
Merge branch 'master' into payments
refactored response to a standard response; setting of principal created date from db NOW() to time.NOw() in PUT
continue with init payment functionality
implemented responseAPI type into projectcurrency and user
create and insert payment token
Merge branch 'metadata_api' of github.com:chruffer/paymentd into payments
add resets on db tests
payment tests extended
include service version in service response: service version 1.1
extend payment tests
service response v1.2 with deprecated error
assign service v1 default logger
Merge branch 'master' of github.com:fritzpay/paymentd into payment_method
added provider api and doc; fix doc for currency api
Merge pull request #28 from chruffer/provider_api

Provider api
Merge remote-tracking branch 'upstream/master' into payments
refactor init payment: get rid of handler