fix some broken links

upgrade all nginx examples to latest version
moved some examples from contrib to this repo

examples/customization/custom-template/README.md

@@ -0,0 +1,8 @@
+This example shows how is possible to use a custom template
+
+First create a configmap with a template inside running:
+```
+kubectl create configmap nginx-template --from-file=nginx.tmpl=../../nginx.tmpl
+```
+
+Next create the rc `kubectl create -f custom-template.yaml`