Virtual File System for Node.js

Note: This code is not maintained anymore. Use memfs and
unionfs instead.

Mount virtual files to your fs filesystem.

``javascript
var nodefs = require("nodefs");

var layer = {
"test/index.js": "console.log('Hello World!')",
"text.txt": "Hello again!"
// ...
};

nodefs.mount("./", layer);
require("./test/index.js"); // Hello World!

var fs = require("fs");
console.log(fs.readFileSync("text.txt").toString()); // Hello again!
`

Why is it useful? It is used in nodefs-drive package to pack your Node.js projects into a single .js file.
When you run the file, nodefs creates the virtual file system and you app runs as if it was running from your hard drive.

TODOs

- Crate a light version with only fs.readFileSync, fs.statSync, and fs.realpathSync.
- Implement the rest of the mehtods.
- Crate a version with read-only file system.
- Split project in multiple packages, lets say: (1) in-memory file system; (2) read-only file system; (3) etc..,
and (4) a union file system that can combine then all together with fs` module.
- http://wiki.commonjs.org/wiki/Filesystem

Interesting:

> Since "fs" must be frozen to be secure, there is no need for the "file" module to assemble aparatus for late
binding to "fs" methods.

http://wiki.commonjs.org/wiki/Filesystem/Names