Node 0.6 updates

[michaeltwofish]

Incorporates #29 and #29.

See
https://github.com/joyent/node/wiki/API-changes-between-v0.4-and-v0.6.

• Don't use require.paths, as it's no longer mutable.
• Don't use process.binding('stdio'), as it was private and has been removed.

Note that no effort has been made to address #24, this is just to get up
and running with node 0.6.

[michaeltwofish]

There's still something a bit funky with the readline stuff with this pull request.

[michaeltwofish]

Some possible responses:

• We'd like this addressed in conjunction with Clean up the mess #24.
• We'd like to maintain backward compatibility with node 0.4.
• We'd like some tests with this.
• Your code is awful, and we wouldn't consider including it.
• The pull request is a mess, fix it up and we'll consider it.
• We won't consider this pull request until the readline stuff is perfect.
• We're open to bribery in the form of expensive scotch.

[michaeltwofish]

Or, you could just commit it :)

Thanks.