Update jQuery: 1.8.3 -> 1.11.1

KNOWN BUG: .slideUp() not working.
Merge pull request #55 from shadowglen/master

use new api for sending dm
Fix sidebar .slideUP() not working

论复制粘贴时候防手抖的重要性...
Merge branch 'jquery2' into devtest
fix issues in jQuery 2.1.1