bootstrap mapping for billing agreement
before adding relations
finish BillingAgreement mapping
change the name of the manager to all inclusive
add initial test class
start process Order
just a little work to get started
Merge pull request #1 from immersivelabs/feature/manager

Feature/manager
advance on billing manager
billing manager updates
Created gateway
Created Gateway
Created Gateway interface
updates
update to mapping, starting to refactor createBillingAgreements
update to mapping, starting to refactor createBillingAgreements
Fleshed out manager and gateway
Add fetch for eligible billing agreement batches
Added an empty function for processing of these billing agreements
Merge pull request #2 from immersivelabs/feature/recurring-billing

[RFC] Initial code for recurring billing
expand billing gateway to work with billing requests also