Updated docs markdown engine.
Updated docs markdown engine.

As per
https://help.github.com/articles/updating-your-markdown-processor-to-kramdown/.

lionelnicolas/chronos,mesos/chronos,mesos/chronos,lionelnicolas/chronos,vixns/chronos,vixns/chronos,motusllc/chronos,vixns/chronos,lionelnicolas/chronos,motusllc/chronos,motusllc/chronos,lionelnicolas/chronos,mesos/chronos,vixns/chronos,mesos/chronos,motusllc/chronos