Added Command Line Guide to toolbox.md - #1

Added Command Line Guide to toolbox.md#1

seankross wants to merge 1 commit into

DataScienceSpecialization:masterDataScienceSpecialization/DataScienceSpecialization.github.io:masterfrom

seankross:masterseankross/DataScienceSpecialization.github.io:masterCopy head branch name to clipboard