Crop defaults to true, added behaviour to crop = false

[jbjanot]

For now, the crop parameter was unused.
It is now set to true by default.
If you pass crop: false to the parameters, il will resize, but without cropping.

Exemple with a 1200px x 800px source image

bfi_thumb("URL-to-image.jpg", array(
    'width' => 100,
    'height' => 100
));

This code will result, as expected, in a 100 x 100 pixels image.

Yet, if you use this syntax :

bfi_thumb("URL-to-image.jpg", array(
    'width' => 100,
    'height' => 100,
   'crop' => false
));

It will result in an image that is 100 x 67 pixels, and not cropped.

Of course, you can still grow images.
And by the way, I used an autoformat tool... Hope you don't mind ;)