Update quasiperiodic.md
Update quasiperiodic.md

Fixed links, changed name, put new lines into point form in Description.
dpshelio/openastronomy.github.io,dpshelio/openastronomy.github.io,Cadair/openastronomy.github.io,Cadair/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,Cadair/openastronomy.github.io,OpenAstronomy/openastronomy.github.io,dpshelio/openastronomy.github.io