New features

Added reservation questions that are asked when a user makes a reservation. They can be added in the detailed admin section. Reservation questions can be set for tools and/or areas and can also be limited to specific tools, specific areas and/or specific projects.
Added Areas, Resources, Staff Charges and Training Sessions to Rest API
Added conditional nesting of related objects in Rest API as well as cherry picking of fields returned using drf-flex-fields (see link for details)
Added a projects page for projects Principal Investigators who are not staff members. This allows them to see project information and users.

Improvements

Added filtering by display and filtering by areas in Reservation admin page.
Added filters to Rest API (for a complete list, see NEMO/views/api.py)
Added a "pinned" field to news to have certain news stay at the top of the feed.
Added optional start date for both projects and accounts. Added optional account type for accounts.
Improved dynamic form (JSON formatted questions):
- Added red asterisk when a field is required
- Added "title_html" attribute to display html in title
- Added "help" attribute (displaying help text for inputs)
- Added "maxlength" attribute to textbox questions (max characters allowed in input)