Add extract pidless.

refs #201
Extract users as well.
refs #201
Shuffle Opal models.
Adds filter for saving searches.

refs openhealthcare/elcid#80
Group data extracts into field CSVs.

refs openhealthcare/elcid#138
Drop name from extracts to pseudonomise.

refs openhealthcare/elcid#143
Make filtering case insensitive by default.

refs openhealthcare/elcid#137
Allow searching by tag.

refs openhealthcare/elcid#139
Set header correctly for investigations.

fixes openhealthcare/elcid#150
Fix bugs with related model names in queries.
Add reportview.

refs #197
Fix commas in values.

refs #151
refs #156
Actually add allergies csv to the zipfile.

refs openhealthcare/elcid#138
Add saving holding screen to modals.

refs #187