README: various style, grammar, clarifications & updates
README: various style, grammar, clarifications & updates
houqp/koreader,koreader/koreader,koreader/koreader,poire-z/koreader,Frenzie/koreader,mwoz123/koreader,lgeek/koreader,Hzj-jie/koreader,NiLuJe/koreader,Markismus/koreader,NiLuJe/koreader,apletnev/koreader,Frenzie/koreader,pazos/koreader,mihailim/koreader,poire-z/koreader