MXS-1300: Add usage to all commands

Added usage instructions for all commands. If the generated usage is used
with the `pkg` packager, it will contain generated script names which are
confusing.

client/maxctrl/maxctrl.js

@@ -54,7 +54,6 @@ program
     .command(require('./lib/show.js'))
     .command(require('./lib/set.js'))
     .command(require('./lib/clear.js'))
-    .recommendCommands()
     .help()
     .demandCommand(1, 'At least one command is required')
     .command('*', 'the default command', {}, () => {