[minor] delete system.out
[minor] Establish index files (for deploying to GAE)
[minor] improve layout and rebuild the index
Update stress testing functions: delete foo users and statuses in nav
bar in all .jsp files; clean status dao methods which require adminID
for security.
Change index.jsp to correspond with others jsp which are editted in the
previous commit
[major] Make all webpages share the same nav bar and footer by using js
(jquery).