Merge pull request #16 from xthiago/fix-sf-version

Makes library fully compatible with symfony components version [2|3|4] and PHP 5.3-7.2

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.

Merge pull request #10 from edegaudenzi/master

- Added a real 2.0 PDF.
- Renamed the special chars PDF accordingly with its version.
- Accordingly changed files providers in the tests.

Tidied up and used the shorthand condition.

Fix #1 - some files are not being overridden

stable

add travis