Proofread/copy-edited README
Proofread/copy-edited README

Closes #4
dimkosru/jdvalidate,dimkosru/jedi-validate,dmitriytat/jedi-validate,dimkosru/jdvalidate,dimkosru/jdvalidate,dimkosru/jedi-validate,dmitriytat/jedi-validate,dmitriytat/jedi-validate,dimkosru/jedi-validate