GSoC update: Stuff done, more to do.

[kpreid]

Stuff done:

• Implemented generic literals.
• Implemented cyclic references in Data-E.
• Various cleanup, debugging support, and committing of stuff previously written.
• Wrote a wiki page documenting Caja-CapTP's major components and files.

Stuff to do:

• Write more documentation/comments.
• Commit as much of the work-in-progress as I can.
  • ...including the incomplete CapTPConnection, even though its tests don't pass yet, so that the partial work can be counted.