Document Che dashboard and test and update the existing Che sections(https://che.openshift.io/dashboard/#/)

[Preeticp]

Context:
che.openshift.io
(https://che.openshift.io/dashboard/#/)

From sass ml:

Burr: For any developer who is interested in "trying Che" or "getting started with Che" the primary URL is
bit.ly/che-workshop (bit.ly/che-workshop).
Mario: I think the front door should be https://www.eclipse.org/che/. We already have a getting started section but nothing about che.openshift.io yet. We should probably integrate that (bit.ly/che-workshop)google doc in the official documentation page.
We also have a couple of newer documents about Che 7 and the new plugin model (Che 7 is next major version that will be released in a few months): bit.ly/che-eclipsecon-short and bit.ly/che-eclipsecon. We plan to transform these workshop tutorials in a few blog post and integrate them in current doc.