cc-2055: switch to init.d

-allow install script to be created from any location (no hardcoded paths)
-make python install scripts return 1 on error
-daemon now started automatically on boot using rc.local autostart
-change all prints to logs instead
-create airtime-uninstall shell script (and remove pypo user in here)
-create pypo user in shell script

python_apps/remove_pypo_user.py

@@ -0,0 +1,14 @@
+import os
+import time
+
+def remove_user(username):
+    os.system("killall -u %s 1>/dev/null 2>&1" % username)
+    
+    #allow all process to be completely closed before we attempt to delete user
+    print "Waiting for processes to close..."
+    time.sleep(3)
+    
+    os.system("deluser --remove-home " + username + " 1>/dev/null 2>&1")
+
+if __name__ == "__main__":
+    remove_user("pypo")