Merge new documentation to master

This merge request merges the new documentation to the master.

Please do not remove the source branch yet until I can test everything for the beat.docs package.

closed

@zmostaani: the request was closed.

Another thing - by default, we should always remove the branch. For info, you can always push the branch back from your computer after rebasing.

@andre.anjos I closed it myself. I realised I need to check some other thing as well. My bad.

@zmostaani No need to close the merge request, just put WIP: in front of the title so it won't get merged accidentally :)

mentioned in merge request !33 (merged)