minor commit
Add "mock" data server mode.
Mock mode will fetch static data, will not access real ZK forum.
Refactory CSS, fix UI on Firefox.
Update to ZK 6.5.0.FL.20120815
Restore content.zul, use vlayout instead of cardlayout.
Make thread contents collapsed by default
Merge pull request #1 from VincentJian/master

Make thread contents collapsed by default
Unchecked Commit before revision.
Stable version for Desktop/iPad/iPhone.
Re-fetch new forum data at 2012.09.06
Backup commit.
Actually is a stable version, but with some random un-reproductive 
MVVM's problem.
ZK 6.5 release version. (Need refactory)