wix, misc: use picture of dimension 32x32 for tray icon + better PEP-8 compliance

src/memory/memory.py

@@ -35,6 +35,7 @@ from sat.core import exceptions
 SAVEFILE_DATABASE = "/sat.db"
 NO_SECURITY_LIMIT = -1
 
+
 class Params(object):
     """This class manage parameters with xml"""
     ### TODO: add desciption in params