Strict validation

[arandilopez]

Adds a new rule for strictly validation. Now you can validate the exact profane word in the content.

<?php
// ...
class MyController extends Controller
{
    public function store(Request $request)
    {
        $this->validate($request, [
            'username' => 'required|strictly_profane:es,en'
        ]);

        // ...
    }
}

This fixes known issues (#9) when you get a error in validation for words like class or analysis, as they include ass and anal respectively, but fails the validation for content like sucker69.