Upload validation

[jorisvaesen]

Started porting upload validation from the 2.x plugin.
It's a standalone validation provider which can optionally be loaded and used.

I've split it up into multiple traits to make it more manageable and give the option to add specific validations (video, pdf, ...) later.

Usage:
$validator->provider('upload', \Josegonzalez\Upload\Validation\UploadValidation::class);

If you only want to use the image validation rules:
$validator->provider('upload', \Josegonzalez\Upload\Validation\ImageValidation::class);

After this you can use it as:
$validator->add('file', 'filePhpUploadSize', [ 'rule' => 'isUnderPhpSizeLimit', 'message' => 'File is too large to upload', 'provider' => 'upload' ]);

If this code could makes it, i'll write some documentation for it.

[coveralls]

Coverage remained the same at 100.0% when pulling c9271e4 on jorisvaesen:master into b652f1c on josegonzalez:master.

[coveralls]

Coverage remained the same at 100.0% when pulling d563e22 on jorisvaesen:master into b652f1c on josegonzalez:master.

[josegonzalez]

Needs 100% test coverage, but I'm on board with the functionality.

[coveralls]

Coverage decreased (-1.5%) to 98.477% when pulling 293c0db on jorisvaesen:master into b652f1c on josegonzalez:master.

[coveralls]

Coverage decreased (-1.5%) to 98.477% when pulling 293c0db on jorisvaesen:master into b652f1c on josegonzalez:master.

[josegonzalez]

Getting there!

[coveralls]

Coverage remained the same at 100.0% when pulling ca927c3 on jorisvaesen:master into b652f1c on josegonzalez:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 8287d64 on jorisvaesen:master into b652f1c on josegonzalez:master.

[josegonzalez]

Do we need the php open/close tags?

[jorisvaesen]

This is how its done in 2.x: https://github.com/josegonzalez/cakephp-upload/blob/2.x/docs/validation.rst

[coveralls]

Coverage remained the same at 100.0% when pulling e9cbbae on jorisvaesen:master into b652f1c on josegonzalez:master.

[coveralls]

Coverage remained the same at 100.0% when pulling cb91a6f on jorisvaesen:master into b652f1c on josegonzalez:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 4911745 on jorisvaesen:master into b652f1c on josegonzalez:master.

[josegonzalez]

Looks good, ship it.