killbill-memoizeit

Added Either class

First test for interacting with the event bus

Added event bus test for different event type

update invoice ddl to use field() notation update invoice …

api to support retrieving unpaid invoices
update invoice api to support date filtering
invoice/entitlement integration
clean up typos in PlanPhase

invoice/entitlement integration

Merge branch 'inv-ent-integration' of github.com:ning/killbill …

into inv-ent-integration

Conflicts:
	api/src/main/java/com/ning/billing/entitlement/api/billing/DefaultBillingEvent.java

Correcting NPE's found by Stephane in code review

Merge branch 'inv-ent-integration' of github.com:ning/killbill …

into inv-ent-integration

Conflicts:
	invoice/src/main/java/com/ning/billing/invoice/InvoiceListener.java
	invoice/src/main/java/com/ning/billing/invoice/glue/InvoiceModule.java
	invoice/src/main/java/com/ning/billing/invoice/model/InvoiceItemList.java
	invoice/src/main/java/com/ning/billing/invoice/notification/DefaultNextBillingDateNotifier.java

Fix guice, lifecycle, bus registration issues in invoice

Merge branch 'inv-ent-integration' of github.com:ning/killbill …

into inv-ent-integration