Can I use _____? Markdown Version - Anyone?

[Gerald Bauer]

Hello,

   Does anyone know if there's something like Can I use___?  that show
what browser supports what HTML5 / CSS3 extensions - in Markdown?

  e.g. can I use simple tables? can I use multi-line tables? can I use
todos? can I use backticks for fenced code blocks? can I use spaces
between header markers (e.g. ##) and the header text etc.

   Any pointers welcome.

    Cheers.

PS: If all works will try to put together a first prototype over the next days.