Update docs with Cython note, refs #646
Update docs with Cython note, refs #646

wenxer/peewee,jarrahwu/peewee,coleifer/peewee,Sunzhifeng/peewee,jarrahwu/peewee,bopo/peewee,ronyb29/peewee,coleifer/peewee,ghukill/peewee,Sunzhifeng/peewee,bopo/peewee,jarrahwu/peewee,teserak/peewee,softside/peewee,wenxer/peewee,zhang625272514/peewee,new-xiaji/peewee,new-xiaji/peewee,stas/peewee,mackjoner/peewee,coleifer/peewee,zhang625272514/peewee,zhang625272514/peewee,Sunzhifeng/peewee,jnovinger/peewee,new-xiaji/peewee,jnovinger/peewee,py4a/peewee,lez/peewee,bopo/peewee