Add documentation about how to launch Orion Dashboard

[notoraptor]

Suggested by @lebrice

There is currently no documentation to describe how to launch Orion dashboard. It may be useful, at it would allow interested people to play with dashboard and suggest additional features or find bugs.

What do you think? @bouthilx

[bouthilx]

Was waiting for the dashboard to have enough features before publicizing it. I think it will be ready for this by the end of this semester. If we can find enough time to document it before end of semester that would be great. Otherwise it should be a priority next semester.

Thanks @lebrice :)