polished the installation instructions
polished the installation instructions

JohannGillium/modern_english_ed,dougj892/bayes4ie2,YanNote/YanNote.github.io,JohannGillium/modern_english_ed,igacc/igacc.github.io,igacc/igacc.github.io,JohannGillium/modern_english_ed,YanNote/YanNote.github.io,igacc/igacc.github.io,igacc/igacc.github.io,dougj892/bayes4ie2,dougj892/bayes4ie2,JohannGillium/modern_english_ed