Add summary stats for CLI

It is useful to have summary statistics for code coverage on the CLI as well as through a web browser

![screenshot 2014-07-28 09 39 46](https://cloud.githubusercontent.com/assets/205245/3718186/f636c19c-1632-11e4-8b8e-f161890e6945.png)

This indentation looks weird to me. Something like:

```php
Total Coverage:    <?php
	$percTotel = ($summary['covered'] / $summary['executable']) * 100;
	displayPercentage($percTotel);
?>%
```

...looks better to me (Also, `Totel`... :-/)