Added more recent version of pouchdb.  Should really switch to using as a git submodule soon.  
Also added couch.mod.js, modified version of couch.js from couchdb installation.  Hacked couch.mod.js to remove some of the assumptions about same origin location of CouchDB, since using with remote CouchDB.
Added a number of options for DevTool pulldown menu, and exporting some vars to window global, to help with testing of PouchDB and CouchDB,
More experimenting with PouchDB persistent local store and synchronization with remote CouchDB database.
More work to deal with bug in update_seq vs last change.seq numbers  
Trying to handle case where database name changed, and new PouchDB hasn't been created yet
Added devtools option to toggle local PouchDB to remote CouchDB continuous syncing on/off