Added more efficient data structure for passing content

- Switched to a more AJAX-ready flow of passing content
- Wrote functions ready to make AJAX calls to a server to then request data from a DB given a user's ID or meeting ID
just fyi the nice thing about organizing users as objects `{...}` is that you can reuse them.  So here, you can even do this in the future:

`[{ name: 'Erick', ... picture: ..}, { name: 'Rajeev', ....}, ..]`

Or, typically users have IDs.  So you could also do `[1,2,3,4,5]`

i know we're just hard coding stuff here and there but just wanted to let you know that tip for future reference.