echo - add input verificaiton. help - prints out commands in sorted order. touch - add comments. type - add error when file not found. add comments. main lib files: add comments, clarify error messages. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11427 6f19259b-4bc3-4df7-8a09-765794883524