===== 3.1.5api修改 =====

Android 3.1.5 api修改如下，''-''代表原来api，''+''代表修改后的api

==== EMGroupChangeListener ====
<code>
-       void onInvitationAccpted(String groupId, String invitee, String reason);
+       void onInvitationAccepted(String groupId, String invitee, String reason);

-       void onGroupDestroy(String groupId, String groupName);
+       void onGroupDestroyed(String groupId, String groupName);

</code>

==== EMCallManager  ====
<code>
-       public boolean streamStarted() 
+       public boolean isStreamStarted() 

-       public int getVideoTimedelay()
+       public int getVideoTimeDelay()

-       public int getVideoFramerate()
+       public int getVideoFrameRate()

-       public int getVideoLostcnt()
+       public int getVideoLostRate()

-       ERROR_INAVAILABLE("error_inavailable")
+       ERROR_UNAVAILABLE("error_unavailable")

-       ERROR_LOCAL_VERSION_SMALLER("error_local_version_smaller")
-       ERROR_PEER_VERSION_SMALLER("error_peer_version_smaller")
+       ERROR_LOCAL_SDK_VERSION_OUTDATED("error_local_sdk_version_outdated")
+       ERROR_REMOTE_SDK_VERSION_OUTDATED("error_remote_sdk_version_outdated")

</code>

==== EMChatManager ====
<code>
-       public boolean isSlientMessage(EMMessage message)
+       public boolean isSilentMessage(EMMessage message)

</code>

==== EasyUtils ====

<code>
-       public static boolean isSdcardExist() 
+       public static boolean isSDCardExist()

</code>