Fixes for #759 - location heirarchy

app/database/migrations/2015_05_04_085151_add_parent_id_to_locations_table.php

@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddParentIdToLocationsTable extends Migration {
+
+	/**
+	 * Run the migrations.
+	 *
+	 * @return void
+	 */
+	public function up()
+	{
+		Schema::table('locations', function(Blueprint $table)
+		{
+			//
+			$table->integer('parent_id')->nullable()->default(NULL);
+		});
+	}
+
+	/**
+	 * Reverse the migrations.
+	 *
+	 * @return void
+	 */
+	public function down()
+	{
+		Schema::table('locations', function(Blueprint $table)
+		{
+			//
+			$table->dropColumn('parent_id');
+		});
+	}
+
+}