Install FontAwesome via Composer.

This also updates the asset publishing and LESS paths accordingly.

Refs #891.

src/Asset/LessCompiler.php

@@ -42,7 +42,10 @@ class LessCompiler extends RevisionCompiler
 
         $parser = new Less_Parser([
             'compress' => true,
-            'cache_dir' => $this->cachePath
+            'cache_dir' => $this->cachePath,
+            'import_dirs' => [
+                'vendor/fortawesome/font-awesome/less' => '',
+            ],
         ]);
 
         try {

src/Install/Console/InstallCommand.php

@@ -357,8 +357,8 @@ class InstallCommand extends AbstractCommand
     protected function publishAssets()
     {
         $this->filesystem->copyDirectory(
-            __DIR__.'/../../../assets',
-            $this->application->publicPath().'/assets'
+            $this->application->basePath().'/vendor/fortawesome/font-awesome/fonts',
+            $this->application->publicPath().'/assets/fonts'
         );
     }