ADDED changes to be discussed in ebinterface group meeting 2013-11-14
ADDED Changes as discussed in AK meeting 20131114
UPDATE Renamed RelatedInvoice to RelatedDocument. Changed cardinality of OtherVATableTaxItem to optional
OtherVATableTax like OtherTax
MINOR Update header information in schema and extension
Merge branch 'ak-meeting/20131114' of https://github.com/pliegl/ebinterface into ak-meeting/20131114
Merge pull request #5 from pliegl/ak-meeting/20131114

Merged changes from the last AK meeting 2013-11-14 as well as some minor updates. Ready for shipment of ebInterface 4p1