Implement initial server and location API routes.

Also fixes a few exception handler issues causing incorrect HTTP status
codes on authorization errors.

app/Models/Server.php

@@ -27,6 +27,7 @@ namespace Pterodactyl\Models;
 use Auth;
 use Cache;
 use Carbon;
+use Schema;
 use Javascript;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Notifications\Notifiable;
@@ -203,6 +204,15 @@ class Server extends Model
         return Javascript::put($response);
     }
 
+    /**
+     * Return the columns available for this table.
+     *
+     * @return array
+     */
+    public function getTableColumns() {
+        return Schema::getColumnListing($this->getTable());
+    }
+
     /**
      * Gets the user who owns the server.
      *