添加语音通话页面
update (去掉call相关)
update log.
update 打开友盟
添加友盟静态库
about call
Merge branch 'develop' of https://github.com/easemob/sdkexamples-ios into develop

# By dujiepeng (2) and jifang1218 (1)
# Via dujiepeng
* 'develop' of https://github.com/easemob/sdkexamples-ios:
  添加友盟静态库
  update 打开友盟
  update log.
delete call
fix:群组长按 crash
fix：message.conversation 释放导致收到消息chatVC无法刷新
fix:断网进入时不显示连接失败
update