fleshing out the user manual. WIP.
Update README.md
added models needed for elasticsearch queries (nothing changed to data managers) and fix some texts until they're changed again
Merge pull request #164 from tbrockman/master

added models needed for elasticsearch queries (nothing changed to data m...
added grayed out button for one field
added guard condition so have to have all fields now
Merge pull request #165 from rjynn/master

now have to have all fields in creating question to add  :) grayed out otherwise.
Uploading iDataManager