Copy CNAME file on gh-pages

Author: Maxime Gréau

.travis.yml

@@ -20,7 +20,7 @@ after_failure:
   - docker logs asciidoc-to-pdf
 
 after_success:
-  - cd output ; cp -R ../images images ; cp -R ../resources resources
+  - cd output ; cp ../CNAME . ; cp -R ../images images ; cp -R ../resources resources
   - git init
   - git config user.name "${EXO_USER_NAME}"
   - git config user.email "${EXO_USER_EMAIL}"