API changes between v0.4 and v0.6

Changed:

• The customFds option to the child_process.spawn method is deprecated.
• You can no longer send a file descriptor through a unix pipe. Instead you can send a handle via child_process.fork.
• fs.symlink takes an optional mode argument, which can either be 'dir' or 'file'. The default is 'file'. This argument is only needed for Windows (it's ignored on other platforms).

Added:

• zlib module
• child_process.fork
• fs.watch
• assert(val) as a shorthand for assert.ok(val)