FEATURE #1452: add table for template paths.

We will not store template directories along with the templates. Templates are now binded to their paths using ID of row in database

database/migrations/2016_02_18_100743_CreateTemplateDirectoriesTable.php

@@ -0,0 +1,63 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateTemplateDirectoriesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('template_paths', function (Blueprint $table) {
+            $table->integer('id', true);
+            $table->timestamps();
+            $table->string('path')
+                  ->comment('Path on filesystem');
+        });
+
+        Schema::table('templates', function (Blueprint $table) {
+            $table->integer('path')
+                  ->comment('ID of template directory')
+                  ->change();
+
+            $table->index('path');
+
+            $table->foreign('path')
+                  ->references('id')
+                  ->on('template_paths')
+                  ->onDelete('cascade')
+                  ->onUpdate('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+
+        // drop FK from templates dir
+        Schema::table('templates', function (Blueprint $table) {
+            $table->dropForeign('templates_path_foreign');
+        });
+
+        // drop template_paths
+        Schema::drop('template_paths');
+
+        // change path column to its original state
+        Schema::table('templates', function (Blueprint $table) {
+            $table->string('path')
+                  ->comment('Path to this template. Given as relative path for theme directory.')
+                  ->change();
+
+            $table->dropIndex('templates_path_index');
+        });
+    }
+}