CC-2758: Make airtime-install script Debian/Ubuntu compatible

-uninstall script added

python_apps/pypo/install/pypo-uninitialize.py

@@ -0,0 +1,15 @@
+from subprocess import Popen
+import os
+import sys
+
+if os.geteuid() != 0:
+    print "Please run this as root."
+    sys.exit(1)
+
+try:      
+    #stop pypo and liquidsoap processes
+    print "Waiting for pypo processes to stop..."
+    p = Popen("/etc/init.d/airtime-playout stop", shell=True)
+    sts = os.waitpid(p.pid, 0)[1]
+except Exception, e:
+    print e