[#36] correct documentation.
[#36] correct documentation.

Showdown is not a constructor.

juanonsoftware/showdown,nilbus/showdown,axter/showdown,webutilz/showdown,mickelfeng/showdown,OMGgogong/showdown,ErisDS/showdown,yaniswang/showdown,xinshitn/showdown,webutilz/showdown,NichenLg/showdown,snegovick/showdown,coolroad/showdown,rollokb/showdown,rollokb/showdown,bsansouci/showdown,jaguerra/showdown,lhagan/showdown,showdownjs/showdown,phw/showdown,axter/showdown,bsnizek/showdown,showdownjs/showdown,twitwi/showdown,snegovick/showdown,twitwi/showdown,pazof/showdown,pazof/showdown,sahat/showdown,nilbus/showdown,yaniswang/showdown,stevemao/showdown,jaguerra/showdown,ErisDS/showdown,phw/showdown,jaguerra/showdown,juanonsoftware/showdown,bsansouci/showdown,mickelfeng/showdown,rollokb/showdown,ErisDS/showdown,lhagan/showdown,digideskio/showdown,alazyer/showdown,NichenLg/showdown,OMGgogong/showdown,digideskio/showdown,sahat/showdown,coolroad/showdown,alazyer/showdown,bsnizek/showdown,xinshitn/showdown,stevemao/showdown