Images from extensions about mr_tinypng

[saphrus]

I had exactly the same problem. For the reason of file_get_contents being blocked on our system, I had to extend some classes anyway So I wrapped everything happening in TinypngService->shrinkImage within
if ((pathinfo($source, PATHINFO_EXTENSION) == 'png') || (pathinfo($source, PATHINFO_EXTENSION) == 'jpg'))

[Scarbous]

At first, thank you for the feedback.

@MoppieMop
The Problem is, that Tinypng can't shrink GIFs.
I will add a mimetype condition.

@saphrus
You say: "I had to extend some classes anyway"
If you send me your changes, maybe I can add it to the extension.

[Scarbous]

Fixed through #2