Problem to include arboreal in node

[Eskatrem]

Hi,

I am not sure it's really an issue with arboreal, as I am rather a noob in javascript. If this is the case, please tell me.
Anyway, I would like to play with arboreal on the console on node.js.
I installed the package as described by cloning this repo and then running nmp install.

However, when I want to load that from the console, I get:

var tmp = require("./lib/arboreal")
undefined
tmp
{ [Function: Arboreal] parse: [Function] }
var tree = new Arboreal();
ReferenceError: Arboreal is not defined
at repl:1:16
at REPLServer.self.eval (repl.js:111:21)
at rli.on.e (repl.js:260:20)
at REPLServer.self.eval (repl.js:118:5)
at Interface. (repl.js:250:12)
at Interface.EventEmitter.emit (events.js:88:17)
at Interface._onLine (readline.js:199:10)
at Interface._line (readline.js:517:8)
at Interface._ttyWrite (readline.js:735:14)
at ReadStream.onkeypress (readline.js:98:10)
var tree = new tmp.Arboreal();
TypeError: undefined is not a function
at repl:1:12
at REPLServer.self.eval (repl.js:111:21)
at rli.on.e (repl.js:260:20)
at REPLServer.self.eval (repl.js:118:5)
at Interface. (repl.js:250:12)
at Interface.EventEmitter.emit (events.js:88:17)
at Interface._onLine (readline.js:199:10)
at Interface._line (readline.js:517:8)
at Interface._ttyWrite (readline.js:735:14)
at ReadStream.onkeypress (readline.js:98:10)

And I can't reproduce the example.

Any pointer would be really appreciated!

Sam