Update README with useful commands
Update README with useful commands

Changes some of the README file to list all the available commonly used commands in bullet format. Some commands are new and/or previously undocumented.
ddmck/Quill-Grammar,empirical-org/Quill-Grammar,empirical-org/Quill-Grammar,empirical-org/Quill-Grammar,ddmck/Quill-Grammar,ddmck/Quill-Grammar