Make describe more meaningful for users

[dgarijo]

Right now the describe does a DESCRIBE SPARQL query. However, it should be a little more meaningful and easy to use:

• Not use the full URI, maybe just the name.
• Show clearly small description, keywords (in text), programming language, Github repo, releases and license.
• Show a little smaller: number of versions, where to get documentation, where to get support, etc.
• Do not show: URIs, property URIs, etc.