Display pass/fail information for all tests

Displaying results for all test seems more informative. I've been using this with Travis-CI, see an [example log output](https://travis-ci.org/andris9/simpleStorage/builds/19055440).

```shell
$ phantomjs runner.js http://localhost:8888/tests/

keys
✔ can use
✔ can not use
✔ flush/index
....

Took 2796ms to run 45 assertions. 45 passed, 0 failed.
```