Re-add note about PyPI which got removed from the docs
Re-add note about PyPI which got removed from the docs

Refs #34.

DoctorJellyface/powerline,bartvm/powerline,S0lll0s/powerline,areteix/powerline,russellb/powerline,QuLogic/powerline,junix/powerline,blindFS/powerline,darac/powerline,cyrixhero/powerline,bezhermoso/powerline,xfumihiro/powerline,s0undt3ch/powerline,bezhermoso/powerline,wfscheper/powerline,bartvm/powerline,xxxhycl2010/powerline,kenrachynski/powerline,firebitsbr/powerline,Luffin/powerline,prvnkumar/powerline,seanfisk/powerline,Liangjianghao/powerline,keelerm84/powerline,lukw00/powerline,S0lll0s/powerline,dragon788/powerline,seanfisk/powerline,junix/powerline,prvnkumar/powerline,Luffin/powerline,Luffin/powerline,s0undt3ch/powerline,xxxhycl2010/powerline,firebitsbr/powerline,QuLogic/powerline,keelerm84/powerline,DoctorJellyface/powerline,firebitsbr/powerline,EricSB/powerline,wfscheper/powerline,russellb/powerline,xfumihiro/powerline,EricSB/powerline,Liangjianghao/powerline,lukw00/powerline,magus424/powerline,IvanAli/powerline,seanfisk/powerline,junix/powerline,kenrachynski/powerline,S0lll0s/powerline,dragon788/powerline,cyrixhero/powerline,IvanAli/powerline,dragon788/powerline,magus424/powerline,bezhermoso/powerline,blindFS/powerline,Liangjianghao/powerline,xxxhycl2010/powerline,russellb/powerline,QuLogic/powerline,s0undt3ch/powerline,blindFS/powerline,DoctorJellyface/powerline,magus424/powerline,xfumihiro/powerline,prvnkumar/powerline,lukw00/powerline,EricSB/powerline,IvanAli/powerline,bartvm/powerline,areteix/powerline,darac/powerline,darac/powerline,wfscheper/powerline,areteix/powerline,kenrachynski/powerline,cyrixhero/powerline