add vamp.io site as showcase

docs/content/showcase/vamp.md

@@ -0,0 +1,15 @@
+---
+date: 2014-06-26T15:45:00Z
+description: Vamp.io microservices platform homepage and documentation
+license: "Apache 2"
+licenseLink: ""
+sitelink: http://vamp.io/
+tags:
+- tech
+- documentation
+- company
+- api
+thumbnail: /img/vamp_landingpage.png
+title: Vamp.io
+---
+