reader.lua: add version to ascii art (#3724)
reader.lua: add version to ascii art (#3724)

As suggested by @poire-z in https://github.com/koreader/koreader/pull/3723#issuecomment-370557018
houqp/koreader,Frenzie/koreader,pazos/koreader,koreader/koreader,lgeek/koreader,mihailim/koreader,NiLuJe/koreader,koreader/koreader,Frenzie/koreader,poire-z/koreader,NiLuJe/koreader,poire-z/koreader,Hzj-jie/koreader,Markismus/koreader,mwoz123/koreader