Billy Spain initial commit -- Derived from mass refactor of Billy Portugal and some minor tweaking
Fixed  a bug on Invoice series sequentiality & Test Fix
Concurrency problem fixed (InvoiceDate < lastInvoiceDate) & Test fixes
Fixed entryBuilders so that the taxes used are those specified by taxPointDate
Manual Invoice support delegated to separate Builders for BillySpain Invoices and CreditNotes
Merge branch 'master' of caixote.premium-minds.local:billy-v2-eos/billy-v2-eos into billy_spain
Fixes to previous merge
Fixed a bug on builder re-usage
Spain Contexts & Taxes
Removed 'end consumer' and other inapplicable generic values
Removed SAFT's certification and Invoice Hash related logic
Localized text to spanish
Removed unused parameters, corrected a typo
Adding Receipt, for invoicing when no customer may be available, on Billy Spain
Small Fixes on Invoice descriptions, removed ReceiptInvoice from BillySpain
WIP -- Localisation on document export
Postal code fix
Correctly localized a region
Escape XML values
Document export fix