EMConversation 成员列表

成员的完整列表，这些成员属于 EMConversation,包括所有继承而来的类成员

-	appendMessage:error:	EMConversation
	conversationId	EMConversation
-	deleteAllMessages:	EMConversation
-	deleteMessageWithId:error:	EMConversation
	ext	EMConversation
-	insertMessage:error:	EMConversation
	isChatThread	EMConversation
-	lastReceivedMessage	EMConversation
	latestMessage	EMConversation
-	loadCustomMsgWithKeyword:timestamp:count:fromUser:searchDirection:	EMConversation
-	loadCustomMsgWithKeyword:timestamp:count:fromUser:searchDirection:completion:	EMConversation
-	loadMessagesFrom:to:count:	EMConversation
-	loadMessagesFrom:to:count:completion:	EMConversation
-	loadMessagesStartFromId:count:searchDirection:	EMConversation
-	loadMessagesStartFromId:count:searchDirection:completion:	EMConversation
-	loadMessagesWithKeyword:timestamp:count:fromUser:searchDirection:	EMConversation
-	loadMessagesWithKeyword:timestamp:count:fromUser:searchDirection:completion:	EMConversation
-	loadMessagesWithType:timestamp:count:fromUser:searchDirection:	EMConversation
-	loadMessagesWithType:timestamp:count:fromUser:searchDirection:completion:	EMConversation
-	loadMessageWithId:error:	EMConversation
-	markAllMessagesAsRead:	EMConversation
-	markMessageAsReadWithId:error:	EMConversation
	messagesCount	EMConversation
-	removeMessagesFromServerMessageIds:completion:	EMConversation
-	removeMessagesFromServerWithTimeStamp:completion:	EMConversation
	type	EMConversation
	unreadMessagesCount	EMConversation
-	updateMessageChange:error:	EMConversation