Add documentation for using usage events for billing
Add documentation for using usage events for billing

[#100574190]

Signed-off-by: Greg Cobb <fe18d20073e6f1e026a80230721afba88bfd797a@pivotal.io>
Signed-off-by: Ben Watts <07c3aeb5d1c0e501a9c18a8170a4fe3ea1c0462a@pivotal.io>
Signed-off-by: Greg Cobb <fe18d20073e6f1e026a80230721afba88bfd797a@pivotal.io>
Signed-off-by: Ben Watts <07c3aeb5d1c0e501a9c18a8170a4fe3ea1c0462a@pivotal.io>

cwest/docs-running-cf,cloudfoundry/docs-running-cf,Orange-OpenSource/docs-running-cf,bridgetkromhout/docs-running-cf