[Confab-developers] Updates

[Jason H. <ja...@cs...>]

- Rewrote how context documents are represented, 
  from ContextDocument to ContextTuple. 

- Changed the result of InfoSpaceAccess queries, so now 
  you get a List of ContextTuples.

- Added logging, so that each infospace has its
  own log file.

- Added more error messages, which get propogated
  through to the HTTP front end

How are things on the CS262 side?