Update automatic metadata creation

[chrwm]

Update to newest OEMetadata standard and update hardcoded information.

Merge create.py and mastr_datapackage

open tasks:

• merge current dev into branch
• update to oemetadata v15
• update hardcoded fields in datapackag_base
• include bnetza example information for each column at the end of description
• add additional columns from open-mastr in each resource
• create metadata for additional tables
• set zenodo URI for each resource
• register in databus for first time and set permanent URI
• refine ontological annotation