Add installation & usage guide to README
Add installation & usage guide to README

YotrolZ/Persei,hejunbinlan/Persei,luzefeng/Persei,nanthi1990/Persei,Yalantis/Persei,ArthurKK/Persei,ArthurKK/Persei,sekouperry/Persei,luzefeng/Persei,sekouperry/Persei,machelix/Persei,nanthi1990/Persei,ernestopino/Persei,beoliveira/Persei,beoliveira/Persei,luzefeng/Persei,nanthi1990/Persei,machelix/Persei,yeahdongcn/Persei,yeahdongcn/Persei,nuan-nuan/Persei,ernestopino/Persei,sekouperry/Persei,tranhieutt/Persei,YotrolZ/Persei,yeahdongcn/Persei,YotrolZ/Persei,yeahdongcn/Persei,hejunbinlan/Persei,ArthurKK/Persei,ArthurKK/Persei,Yalantis/Persei,machelix/Persei,beoliveira/Persei,yeahdongcn/Persei,machelix/Persei,tranhieutt/Persei,machelix/Persei,tranhieutt/Persei,YotrolZ/Persei,nanthi1990/Persei,sekouperry/Persei,tranhieutt/Persei,ArthurKK/Persei,hejunbinlan/Persei,nanthi1990/Persei,ernestopino/Persei,luzefeng/Persei,nuan-nuan/Persei,beoliveira/Persei,hejunbinlan/Persei,beoliveira/Persei,tranhieutt/Persei,ernestopino/Persei,luzefeng/Persei,YotrolZ/Persei,hejunbinlan/Persei