增加群组语言功能

app.py

@@ -1,6 +1,6 @@
 # encoding:utf-8
 
-import config
+from config import conf, load_config
 from channel import channel_factory
 from common.log import logger
 
@@ -9,10 +9,10 @@ from plugins import *
 def run():
     try:
         # load config
-        config.load_config()
+        load_config()
 
         # create channel
-        channel_name='wx'
+        channel_name=conf().get('channel_type', 'wx')
         channel = channel_factory.create_channel(channel_name)
         if channel_name=='wx':
             PluginManager().load_plugins()