One line change to test Travis (now I've turned it on)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

README

@@ -4,3 +4,5 @@ You can find a set of helper utilities under tools/ and the modules
 under ccan/.  The recommended way to add ccan modules to your project
 is to create a ccan/ directory and add one module per subdirectory
 (see tools/create-ccan-tree).
+
+Enjoy!