Mustang 2.0.1

Fixes

• corrected VAT calculation on prices with >2 decimals (PR#195 thanks to weclapp-dev)
• have fax numbers only in appropriate profiles, i.e., extended
• do not list tax numbers for shiptotradeparties
• do not expect dueDate for corrected invoices
• BigDecimal specific refactoring PR #192 Thanks to weclapp-dev
• Preserving metadata PR #193 Thanks to mr-stephan
• corrected more than 100 javadoc entries

New features

• XR test now includes guideline ID (of XRechnung 1.2.2) #172
• support zero-rated goods: confirm that VAT category code switches from S to Z on 0%VAT
• new sample invoice
• delivery period also on item level
• support specification of account (holder) names
• new sample invoice (20201121_508)