changelog: Add release 0.9.0

As long as cmake doesn't generate suitable deb packages, we need to
switch back :(

mbus/mbus-protocol.c

@@ -1,8 +1,3 @@
-#pragma GCC diagnostic push
-// ignore these warnings, it is third party code
-#pragma GCC diagnostic ignored "-Wpointer-sign"
-#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
-
 //------------------------------------------------------------------------------
 // Copyright (C) 2010-2011, Robert Johansson, Raditex AB
 // All rights reserved.
@@ -5254,5 +5249,3 @@ mbus_is_secondary_address(const char * value)
 
     return 1;
 }
-
-#pragma GCC diagnostic pop