first inspire xml upload form
Merge remote-tracking branch 'upstream/34-dataset-unified-schema' into 34-datasets
created INSPIRE from_xml load form, fixed some errors in schema and corrected tests
corrections to from_xml INSPIRE form
Merged with smanousopoulos/34-datasets (draft import from XML metadata)
Merge branch '34-dataset-unified-schema' into 41-unicode-serializers