add Laravel 4.2+ bridge
add Laravel mention
rename facade class
Works with Laravel 4.1, which runs under PHP 5.3
Merge branch 'feature/laravel-service' of github.com:cviebrock/slugify into cviebrock-feature/laravel-service

* 'feature/laravel-service' of github.com:cviebrock/slugify:
  Works with Laravel 4.1, which runs under PHP 5.3
  rename facade class
  add Laravel mention
  add Laravel 4.2+ bridge
Fixed code style and improved tests for Laraval provider
Merge branch 'cviebrock-feature/laravel-service'

* cviebrock-feature/laravel-service:
  Fixed code style and improved tests for Laraval provider
  Works with Laravel 4.1, which runs under PHP 5.3
  rename facade class
  add Laravel mention
  add Laravel 4.2+ bridge