Update Facade references in docs to avoid confusion

It gets auto-registered as CDN in 5.5+, so updated docs to be consistent
no matter the version. Even if you add the service provider yourself

readme.md

@@ -57,7 +57,7 @@ Laravel 5.4 and below: Add the service provider and facade to `config/app.php`:
 ```php
 'aliases' => array(
      //...
-     'Cdn' => Publiux\laravelcdn\Facades\CdnFacadeAccessor::class
+     'CDN' => Publiux\laravelcdn\Facades\CdnFacadeAccessor::class
 ),
 ```
 
@@ -233,32 +233,32 @@ CAUTION: This will erase your entire bucket. This may not be what you want if yo
 
 #### Load Assets
 
-Use the facade `Cdn` to call the `Cdn::asset()` function.
+Use the facade `CDN` to call the `CDN::asset()` function.
 
 *Note: the `asset` works the same as the Laravel `asset` it start looking for assets in the `public/` directory:*
 
 ```blade
-{{Cdn::asset('assets/js/main.js')}}        // example result: https://js-bucket.s3.amazonaws.com/public/assets/js/main.js
+{{CDN::asset('assets/js/main.js')}}        // example result: https://js-bucket.s3.amazonaws.com/public/assets/js/main.js
 
-{{Cdn::asset('assets/css/style.css')}}        // example result: https://css-bucket.s3.amazonaws.com/public/assets/css/style.css
+{{CDN::asset('assets/css/style.css')}}        // example result: https://css-bucket.s3.amazonaws.com/public/assets/css/style.css
 ```
 *Note: the `elixir` works the same as the Laravel `elixir` it loads the manifest.json file from build folder and choose the correct file revision generated by  gulp:*
 ```blade
-{{Cdn::elixir('assets/js/main.js')}}        // example result: https://js-bucket.s3.amazonaws.com/public/build/assets/js/main-85cafe36ff.js
+{{CDN::elixir('assets/js/main.js')}}        // example result: https://js-bucket.s3.amazonaws.com/public/build/assets/js/main-85cafe36ff.js
 
-{{Cdn::elixir('assets/css/style.css')}}        // example result: https://css-bucket.s3.amazonaws.com/public/build/assets/css/style-2d558139f2.css
+{{CDN::elixir('assets/css/style.css')}}        // example result: https://css-bucket.s3.amazonaws.com/public/build/assets/css/style-2d558139f2.css
 ```
 *Note: the `mix` works the same as the Laravel 5.4 `mix` it loads the mix-manifest.json file from public folder and choose the correct file revision generated by webpack:*
 ```blade
-{{Cdn::mix('/js/main.js')}}        // example result: https://js-bucket.s3.amazonaws.com/public/js/main-85cafe36ff.js
+{{CDN::mix('/js/main.js')}}        // example result: https://js-bucket.s3.amazonaws.com/public/js/main-85cafe36ff.js
 
-{{Cdn::mix('/css/style.css')}}        // example result: https://css-bucket.s3.amazonaws.com/public/css/style-2d558139f2.css
+{{CDN::mix('/css/style.css')}}        // example result: https://css-bucket.s3.amazonaws.com/public/css/style-2d558139f2.css
 ```
 
-To use a file from outside the `public/` directory, anywhere in `app/` use the `Cdn::path()` function:
+To use a file from outside the `public/` directory, anywhere in `app/` use the `CDN::path()` function:
 
 ```blade
-{{Cdn::path('private/something/file.txt')}}        // example result: https://css-bucket.s3.amazonaws.com/private/something/file.txt
+{{CDN::path('private/something/file.txt')}}        // example result: https://css-bucket.s3.amazonaws.com/private/something/file.txt
 ```