updated error handling
refactor for json webservice output
bugfix: check if pid is object or array
added request for holdings
created webservice mockup for open_holdingstatus
updated path to error message
clean out old code
holdingsRequest merges errors and responders
remove faulty type hints
refactor for unit testing
made unit tests for parsing webservice localisation  result
set default value for
Tagging version 7.x-0.1.
Merge branch 'release/7.x-0.1'