Push some basic add server functionality

Doesn’t support adding the server, but adds improved support for
handling picking server location, node, and ip+port

database/migrations/2015_12_07_043347_add_assigned_to.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddAssignedTo extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('allocations', function (Blueprint $table) {
+            $table->mediumInteger('assigned_to')->unsigned()->nullable()->after('port');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('allocations', function (Blueprint $table) {
+            $table->dropColumn('assigned_to');
+        });
+    }
+}