[WIP] Script to test the cljs repl with phantomjs.

Hello, I don't know if a phantomjs repl test is still wanted. If it is I will add the script to `script/test` and track down the `load-file` issue.

Here is what it does:

1. Start a phantomjs process that connects to localhost.
2. Start a cljs repl and evaluate code.
3. Check phantomjs output.

Run via

```sh
cd samples/repl;
../../script/phantomjs-test phantomjs-script.js
```