Added/upgraded Slovak messages, and Slovak and Czech keyboard layout.

diff --git a/programs/clock/rsrc.rc b/programs/clock/rsrc.rc
index 8db7d47..f57353d 100644
--- a/programs/clock/rsrc.rc
+++ b/programs/clock/rsrc.rc
@@ -19,6 +19,7 @@
 #include "Fi.rc"
 #include "Fr.rc"
 #include "Pt.rc"
+#include "Sk.rc"
 #include "Sw.rc"
 #include "Wa.rc"