Replaced double quote with single in Markdown of README
Replaced double quote with single in Markdown of README

kshanafelt/commandline,kshanafelt/commandline,rmboggs/commandline,Emergensys/commandline,anthonylangsworth/commandline,nausley/commandline,Thilas/commandline,Emergensys/commandline,Thilas/commandline,anthonylangsworth/commandline,rmboggs/commandline,nausley/commandline