instead of informing all users every time someone enters the room.

so rename model and only use it in the VCards collection.

Include entity capabilities hash in outgoing presences

Also, started some work on using jsdoc for rendering API documentation.
Ideally that would go into a separate commit but that would take ages to
untangle.

- For roster contacts, only show remove icons on hover.
- Show light background color when hovering over an item in the
controlbox.

Ideally this background color will be 100% of the controlbox width, but
I'm not opening that can of worms now...

Update the occupants list when occupants are added/removed from the
member lists.

Refetch the members lists when adding a new member via invite

updates #1099

I find it useful to be able to close them

- Show users who are registered on the different members lists
- Show badges indicating user's roles and affiliations