Added back some wiki links.
Added back some wiki links.

raybuhr/pyfolio,quantopian/pyfolio,r0k3/pyfolio,yanheven/pyfolio,ChinaQuants/pyfolio,yanheven/pyfolio,r0k3/pyfolio,quantopian/pyfolio,raybuhr/pyfolio,dursk/pyfolio,sketchytechky/pyfolio,ChinaQuants/pyfolio,sketchytechky/pyfolio,chayapan/pyfolio,YihaoLu/pyfolio,YihaoLu/pyfolio,femtotrader/pyfolio,femtotrader/pyfolio,dursk/pyfolio