Added possibility to define Templates with arguments

[eightyfive]

Hi,

I added what I believe is a simple yet very helpful trick. But I obviously may not see the entire picture.

That would fully resolve issues like this one:
Intervention/image#368

And would still hold the security argument:
Intervention/image#241

See basic example:

'templates' => array(
      'small' => 'Intervention\Image\Templates\Small',
      'medium' => 'Intervention\Image\Templates\Medium',
      'large' => 'Intervention\Image\Templates\Large'
  )

Would become:

use Intervention\Image\Templates\Fit;

'templates' => array(
      'small' => [Fit::class, 120, 90],
      'medium' => [Fit::class, 240, 180],
      'large' => [Fit::class, 480, 360]
  )

And would allow easy customisation.

What are your thoughts?

[eightyfive]

Does it make sense?

The problem I was facing is that I had to create a new Template for every different parameters combination of a given image transformation (which is exactly the problem of the documentation example: small, medium, large are all the same transformation).

[eightyfive]

Up.