chnged the name of ketida to Ketty

Changed the name of Ketida to Ketty added the photos. Close issue #417

_drafts/form/demo.html

 ---
 layout: forms
-title: Ketida Demo Request
-permalink: /get-your-instances/ketida-demo
+title: Ketty Demo Request
+permalink: /get-your-instances/ketty-demo
 ---
-{% include form-ketida-demo.html %}
+{% include form-ketty-demo.html %}