update our landing page

[janverbesselt]

-modernise
-provide update status of the project and activities.

[janverbesselt]

modernise/improve structure of the page- could be a first subtask

[janverbesselt]

I can provide content/overview /status and outlook

[janverbesselt]

I have started creating a landing page via a RMarkdown document that then creates a .md document. The .Rmd file still needs some work; help is welcome

• content - adding references
• overview
• link to the Readme for installing the BFAST github package,
  etct