修正部分bug，替换图片
待合并
Merge pull request #53 from windyarts/master

Final fixes for polish week
Merge branch 'master' of https://github.com/wandoulabs/satan
支持快捷键
支持shift
联系人显示title
待合并 pollish week
支持修改头像
Merge pull request #54 from wangxiao/master

待合并 polish week
Merge branch 'master' of git://github.com/wandoulabs/satan