Merge pull request #2 from VincentJian/master

implement card view page
Implement Sidebar page.
tune CSS style
implement without EventQueue
implement select milestone in sidebar
Rename CardViewVM.java
Refactory change content function.
Fix web.xml schema error.
Merge remote-tracking branch 'vincent/NoEventQueue'
Split userStatus.zul from sidebar.zul, and do some refactory.
Fine tune layout