add pypo user to audio group during installation.

pypo/install/pypo-install.py

@@ -35,6 +35,9 @@ def create_user(username):
     print "Creating user "+username
     os.system("adduser --system --quiet --group --shell /bin/bash "+username)
     
+    #add pypo to audio group
+    os.system("adduser " + username + " audio")
+    
     #set pypo password
     p = os.popen('/usr/bin/passwd pypo', 'w')
     p.write('pypo\n')

pypo/pypo-cli.py

@@ -693,6 +693,8 @@ class Playout:
             # Get any extra information for liquidsoap (which will be sent back to us)
             liquidsoap_data = self.api_client.get_liquidsoap_data(pkey, schedule)            
             logger.debug("Sending additional data to liquidsoap: "+liquidsoap_data)
+            
+            #Sending JSON string. Example: {"schedule_id":"13"}
             tn.write("vars.pypo_data "+liquidsoap_data+"\n")
                 
             tn.write(self.export_source + '.flip')