Prep for 2.5
Initial work on RSVP system
Simplify logic
Once nonce should suffice for the whole RSVP form
Form simple attendance recording process
Update nonce check
Basic work on RSVPing authenticated users
Complete initial work on attendees (authed attendees only so far)
Basic unauthed RSVP supported
Support unauthed/anon RSVP in RSVP form
Add ABSPATH checks
Tweaks and corrections to RSVP frontend
Update readme re RSVP facilities
Further tweaks, CSS, etc
Set to 2.5