Idea: trymodule .

Hey @VictorBjelkholm. I love this module!

It would be cool to be able to run `trymodule .` or `trymodule some/dir` to load a REPL for a given directory, using the name of the directory as the name of required module:

```
cd projects/foo
trymodule .
```

Then in the repl, `foo` would be set to the value of `require('.')`