Add Ticket mechanism
Modify Ticket mechanism
Update Ticket mechanism

Conflicts:
	billy-core/src/main/java/com/premiumminds/billy/core/services/documents/impl/DocumentIssuingHandlerImpl.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/documents/PTCreditNoteIssuingHandler.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/documents/PTGenericInvoiceIssuingHandler.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/documents/PTInvoiceIssuingHandler.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/documents/PTSimpleInvoiceIssuingHandler.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/persistence/PTCreditNotePersistenceService.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/persistence/PTInvoicePersistenceService.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/persistence/PTReceiptInvoicePersistenceService.java
	billy-portugal/src/main/java/com/premiumminds/billy/portugal/services/persistence/PTSimpleInvoicePersistenceService.java
Update Ticket mechanism tests
Update tests of ticket mechanism
fix Currency bug
Update tests with tickets
Merge branch 'develop-transactional' into develop