Updated TravisCI (markdown)

TravisCI.md

@@ -1,6 +1,14 @@
 It's recommended to first refer to the official instructions regarding using ShellCheck with Travis CI: \
 https://github.com/koalaman/shellcheck#travis-ci:
 
+For a truly simple configuration, place the following in your `.travis.yml`:
+```yaml
+language: shell
+sudo: false
+script:
+  - bash -c 'shopt -s globstar; shellcheck **/*.{sh,ksh,bash}'
+```
+
 Note:
 >Travis CI has now integrated ShellCheck by default, so you don't need to manually install it.