Add rfswarm to help people become aware that they can use robotframework for performance testing.

[damies13]

Hi,

I am the maintainer of rfswarm and I would like to request that you add rfswarm to the robotframework page to help people become aware that they can use robotframework for performance testing.

I would suggest that the other tab of the tools section is probably the best place for the link, but I'll leave that up to your discretion

https://github.com/damies13/rfswarm#rfswarm-robot-framework-swarm

Thanks,

Dave.

[samipe]

Added to tools, thanks!