fix xcode6 ios8 beta2.
SDK-614
创建群组页面修改
接口替换
Merge branch 'develop' of https://github.com/easemob/sdkexamples-ios into develop

# By jifang1218
# Via jifang1218
* 'develop' of https://github.com/easemob/sdkexamples-ios:
  fix xcode6 ios8 beta2.
change present view controller to present movie player view controller for video message type.
no message
Merge branch 'develop' of https://github.com/easemob/sdkexamples-ios into develop

# By jifang1218
# Via jifang1218
* 'develop' of https://github.com/easemob/sdkexamples-ios:
  change present view controller to present movie player view controller for video message type.
bugfix for SDK-631
ios 最后一条发的是位置消息，但是消息列表显示是【视频】

root cause:
missing break in switch statement. chatlist view controller.
in method subTitleMessageByConversation:

solution:
add missing break.
no message
Merge branch 'develop' of https://github.com/easemob/sdkexamples-ios into develop

# By jifang1218
# Via jifang1218
* 'develop' of https://github.com/easemob/sdkexamples-ios:
  bugfix for SDK-631 ios 最后一条发的是位置消息，但是消息列表显示是【视频】
no message
groupDetailViewController不进dealloc
no message
no message
SDK-553
SDK-452
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MWPhotoBrowser和SDWebImage替换成最新的库
bugfix for SDK-677

description:
现在, 当通过REST接口删除用户的时候, 会调用 Johnson Ma 提供了ejabberd的删除用户接口
可是, 在这样删除一个当前在ios设备上登陆着的用户的时候, ios弹出提示说您的账号在其它设备上登陆(大概)的消息, 应该提示说您的账号被删除之类的吧
p.s. 没有测试android

root cause:
iOS treats account removal error as login conflict.

solution:
distinguish account removal error, add didRemovedFromServer event to chat manager.