First support for multiple users.
Removing user name from header
Project Controller using Badge.clear();
Projects sorted by user
grouping projects by user.
Prefs: managing multiple users.
Projs: sorting projects.
Experiments with JSONRequest
TODO: updated.
organizing html
added query feature to el method
Adding multiple users support.
using the new el() method
specs using list.src.js instead of projs.src.js
added utils to background.html
Header: querying DOM modified.
added utility function called isEmptyObject.
using another schema for the project's json.
using jquery for DOM and Ajax
removed jsonrequest (using jquery)