Add support for allocation management on nodes.

Allows deleting entire IP blocks, as well as allocating new IPs and
Ports via CIDR ranges, single IP, and single ports or a port range.

app/Models/Allocation.php

@@ -14,4 +14,11 @@ class Allocation extends Model
      */
     protected $table = 'allocations';
 
+    /**
+     * Fields that are not mass assignable.
+     *
+     * @var array
+     */
+    protected $guarded = ['id', 'created_at', 'updated_at'];
+
 }