Cleanup the directory structure

It was starting to get messy so I thought I'd find a place for
everything and put everything in it's place ;-)
Move the test pages into a new directory.
manifest: fix broken json
xmlcomms.js: make failure to talk to the edit-server generate a
notification

Hopefully this makes an edit-server failure more explicit. I've
also made it open up the options tab when you close the notification.
manifest: more cleanups.
options: make the setting of load-path explicit

Old timers will hopefully not add a duplicate entry but this was
confusing newer users. Thanks to Konrad Voelkel for the bug report.
ta_test.html: jquery has moved.