rename README.TXT to README.md
rename README.TXT to README.md

for better rendering in Github

frankyifei/koreader-base,mwoz123/koreader,Markismus/koreader,apletnev/koreader-base,frankyifei/koreader,chrox/koreader,NiLuJe/koreader-base,NiLuJe/koreader,pazos/koreader,houqp/koreader-base,koreader/koreader,Frenzie/koreader-base,koreader/koreader-base,houqp/koreader-base,mihailim/koreader,apletnev/koreader-base,frankyifei/koreader-base,Hzj-jie/koreader-base,houqp/koreader-base,NiLuJe/koreader,houqp/koreader-base,frankyifei/koreader-base,koreader/koreader-base,chihyang/koreader,Hzj-jie/koreader,ashhher3/koreader,koreader/koreader-base,poire-z/koreader,NickSavage/koreader,Frenzie/koreader,NiLuJe/koreader-base,Hzj-jie/koreader-base,apletnev/koreader-base,apletnev/koreader-base,koreader/koreader,NiLuJe/koreader-base,NiLuJe/koreader-base,Frenzie/koreader-base,noname007/koreader,robert00s/koreader,frankyifei/koreader-base,lgeek/koreader,ashang/koreader,Frenzie/koreader-base,Hzj-jie/koreader-base,Frenzie/koreader-base,Frenzie/koreader,koreader/koreader-base,houqp/koreader,poire-z/koreader,apletnev/koreader,Hzj-jie/koreader-base