1. re-write default.html file for static main menu display without any json call
2. re-write bb.js for better structure of backbon(MVC) structure, and re-define each view, handler name of the view
3. update summary.json for full match JSON format with "(double-quote) instead of '(single-quote)
4. add blockUI jQuery plugin
5. update doSystem.py, hope to send the correct json content-type in header, but if i set application/json will fail.still need to check
6. complete System -> Summary page with pure ajax + backbone structure
7. add System -> Summary auto-refresh function