Chaining in a loop

In a current project I needed to be able to chain a "Commander.js command" in a loop.

So, this is my approach, which might be helpful for somebody who is facing the same kind of problem.

```javascript
var cli = require("commander");

;(function () {
    "use strict";

    var commands = require("./commands");

    //
    // Command structure:
    //
    // {
    //     pattern: "add [url]",
    //     description: "Add command foo.",
    //     options: [
    //         {
    //             pattern: '-t, --tags "<comma-separated tags>',
    //             description: "The addable tags."
    //         },
    //         {
    //             pattern: '-ver, --verbose',
    //             description: "Verbose output"
    //         }
    //     ]
    // }
    //

    commands.forEach(function (command) {
        cli
            .command(command.pattern)
            .description(command.description)
            .and(function (cli) {
                if (command.options) {
                    command.options.forEach(function (option) {
                        cli.option(option.pattern, option.description);
                    });
                }
            })
            .action(command.exec);
    });
})();
```