Adjustments on Markers: user can't post new marker if too close to another one + clicking the create button will create a "placeholder" marker to show where the marker will be posted
<?php namespace TestCAS\Http\Controllers;
use Illuminate\Foundation\Bus\DispatchesCommands;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
abstract class Controller extends BaseController
{
use DispatchesCommands, ValidatesRequests;
}