Add fallback for fields for which we don't know the header name in export

- Add an export header name for uniprotName
- Prevent possible problems by exporting all the properties listed in
  datatypemodule.rowProperties/dataProperties, even if we don't know the
  appropriate header name.
Some small organisational changes in HighDimExportService
Split long maps onto multiple lines
Merge pull request #24 from thehyve/features/SAN-200_export_all_data

Add fallback for fields for which we don't know the header name in expor...