pcomfortcloud.py: make the script executable

It is now possible to use:
$ ./pcomfortcloud.py
to run the script on Unix.

Author: LudovicRousseau

pcomfortcloud.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 """ Command line interface for Panasonic Comfort Cloud """
 from pcomfortcloud import __main__
-__main__.main()
+__main__.main()