hid code editor tab when editing a doc

The single tab was sad and lonely. Left all
the JS around, though, for when Feild Editor
decides to rejoin Code Editor.
Fauxton copy tweaks
Fixed init caps on Add New Databases
Wwitched Add to New in Doc dropdown
Also (accordingly) switched "New doc" and
"New view" to "Document" and "Secondary Index"
accordingly.
tweaked Create/Edit Index labels
%s/Advanced Options/Query Options
empty tasks list just says No tasks
currentView was not being populated. Could come
back when it works.
jquery.couch.js: db.changes().stop() should abort XMLHTTPRequest
remove initialize
extensions added for sidebar
Fauxton: Improvements and fixes