Fix issue #11 - Remove test file with special chars on its name

There is an issue on Windows with file:

`Sp3ci4l\"; <'Ch4r5'> !\302\243$%&()=?^[]{}\303\250@#\302\247.pdf`.

I'm cannot debug it because I don't have a Windows machine. In order
to fix the issue I'm removing the problematic file.

README.md

@@ -61,4 +61,4 @@ Is really simple add new implementation of guesser or converter , just implement
 
 ## Running unit tests
 
-Run `phpunit -c /tests`.
+Run `phpunit -c tests`.

tests/Converter/GhostscriptConverterCommandTest.php

@@ -30,7 +30,6 @@ class GhostscriptConverterCommandTest extends PHPUnit_Framework_TestCase
         'v1.4.pdf',
         'v1.5.pdf',
         'v1.6.pdf',
-        'v1.7 filename with "Sp3ci4l"; <\'Ch4r5\'> !£$%&()=?^[]{}è@#§.pdf',
         'v1.7.pdf',
         'v2.0.pdf',
     );
@@ -120,7 +119,6 @@ public static function filesProvider()
             array(__DIR__ . '/../files/stage/v1.4.pdf', '1.4'),
             array(__DIR__ . '/../files/stage/v1.5.pdf', '1.4'),
             array(__DIR__ . '/../files/stage/v1.6.pdf', '1.4'),
-            array(__DIR__ . '/../files/stage/v1.7 filename with "Sp3ci4l"; <\'Ch4r5\'> !£$%&()=?^[]{}è@#§.pdf', '1.4'),
             array(__DIR__ . '/../files/stage/v1.7.pdf', '1.4'),
             array(__DIR__ . '/../files/stage/v2.0.pdf', '1.4'),
         );