Fix bugs in iframe workaround for POST requests
Make the notebook ID optional
Added a few notes of things to do
Merge pull request #399 from ihanson/nb-id

Starting a kernel
Commit the hodgepodge of scripts to run the cell server on a computer.

At the top-level, run the restart command in the directory.

Use the check_sagecell_server command in a cron script to reboot the server if it's down.
Organize todo list
Reorganize extensions