Progress towards jQuery

Checkpoint: things are a mess, but the top menubar is beginning to work.
Restored Bootstrap

On a bit more research, Bootstrap and jQuery aren't horribly
incompatible.  So let's use both of them together for now.  This makes
everything look decent again.
Top menubar now working more or less right

And is more functional than it was before.
Tweaked Bootstrap to match jQuery

Very rough quick draft; changes a few key colors to match our jQuery
theme, and re-downloaded Bootstrap.
Double-click to edit now works, if not quite as desired

For some reason, I can't see to select by id, which is pretty damned
serious.  But the functionality works.
Double-click to edit now works correctly

Fixed a dumb bug in how we display the contents of the Thing.
Attachment download is now a menu pick

Got that annoying button out of the bottom of the display.
Object export has been moved to a menu pick

Which is where it always should have been...
Improved name truncation in menus