Release notes for PINT AE Billing

Compliance criteria modified to not requiring support for negative invoices in UAE.

Cardinality for BTAE-03 Credit note reason set to 1..1 from 0..1

Name of ibt-007 changed from "VAT tax point date" to "VAT point date"

Corrections in context for rules ibr-132-ae and ibr-148-ae. Examples updated accordingly.

Removing code list UNECE2005, not used in any UAE business term.

Rule ibr-164-ae removed, redundant because BTAE-08 is mandatory.

Text in rule ibr-119-ae expanded for clarification. No change to shematron.

Textual edits to several rules without changing context or schematron for rules: ibr-115-ae, ibr-120-ae, ibr-121-ae, ibr-124-ae, ibr-134-ae, ibr-135-ae, ibr-137-ae, ibr-138-ae, ibr-139-ae, ibr-141-ae, ibr-145-ae, ibr-149-ae, ibr-152-ae, ibr-153-ae, ibr-175-ae, ibr-175-ae, ibr-176-ae, ibr-177-ae, ibr-179-ae.

Name of IBT-032 change to "Seller tax registration identifier", to be in line with the definition.