code: function processCommand (cmd, options) {
  	var module = checkForModule(cmd);
  
  	// execute module if exists
  	if (module) {
  		return executeModule(module, options);
  	} else {
  		processInstallCommands(['install', cmd], options, function (err) {
  			if (err) {
  				noModuleFound(cmd);
  			}
  			module = checkForModule(cmd);
  
  			// execute module if exists now
  			if (module) {
  				executeModule(module, options);
  			}
  		});
  	}
  }
docs: process the command