Modified code coverage script to also output files/lines not covered by the tests

Example output:

```
Code coverage is 45.234493192133%, which is below the accepted 80%
File: /home/mandx/projects/freespear/mobilerider-client-php/lib/Mr/Api/AbstractClient.php
	NCLOC: 42 of 105 total
	Classes: 1
	Covered methods: 0 of 1 total
	Covered conditionals: 0 of 0 total
	Covered statements: 7 of 10 total
	Covered elements: 7 of 11 total
...[  99]	            case self::METHOD_DELETE:
...[ 100]	                return call_user_func_array(array($this, strtolower($method)), $args);
...[ 101]	            default:
-->[ 102]	                throw new MrException("Invalid request method");
-->[ 103]	        }
-->[ 104]	    }
...[ 105]	}
...
```

Where the `-->` lines are those reported as non-covered by the tests, and the `...` lines are just surrounding lines (currently hardcoded to 3 lines behind an 3 lines ahead).