Symfony 3.0 support

[jbgomond]

Q	A
Bug fix?	no
New feature?	no
BC breaks?	yes
Deprecations?	no
Tests pass?	yes
Fixed tickets	#76
License	MIT

I've added Symfony 3.0 support and PSR-4 to the bundle.

Notice : I've restricted this to Symfony 3.0 but it is also compatible with Symfony 2.8 (juste have to modify the composer.json file).

[QuingKhaos]

@MJBGO Btw. why was the class renamed to EWZRecaptchaType? This was IMHO a huge BC break, especially as this got released in a bugfix version.

RecaptchaType::class would be never a problem, because it's still namespaced..

[QuingKhaos]

And I don't understand what a change from XML to YAML for services has to do in a Symfony 3 support PR? That's annoying..

[JarJak]

This one destroyed my app... If you do BC breaks, please follow semantic versioning. Part of my composer.json:
"excelwebzone/recaptcha-bundle": "^1.4",
in Symfony 2.8 I had form field type defined as 'ewz_recaptcha' which does not exists so I had exceptions: "Could not load type "ewz_recaptcha". After changing to EWZRecaptchaType::class everything works fine.

[jbgomond]

Not really my fault, it was written BC breaks from the beginning ...

But I agree, creating another big version for that was the way to go