Add chapter about Robot Framework Dashboard to the Reporting Test Results Page (or subpage)

[MobyNL]

Content:

• What is Robot Framework Dashboard?
• Why use Robot Framework Dashboard
• How to use Robot Framework Dashboard
• Examples
• Eventually, link to Robocon talk (might take a while)

[timdegroot1996]

Apart from the robocon Talk everything has been created in the pull request for it :)

[MobyNL]

PR #82