Fix loadLocales for Laravel 5.1
Fix loadLocales for Laravel 5.1

Pluck in 5.2 is like lists in 5.1 for a collection but pluck for an Eloquent Builder return a string. 
https://laravel.com/api/5.1/Illuminate/Database/Eloquent/Builder.html#method_pluck
And it is no good for array_merge.
RogueSheep-nl/laravel-translation-manager,nickurt/laravel-translation-manager,barryvdh/laravel-translation-manager,carlosrgzm/laravel-translation-manager