added documentation to main repository.

documentation/session/config.md

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+<a name="config"></a>
+## Session Configuration
+
+- [File System Sessions](#file)
+- [Database Sessions](#database)
+- [Memcached Sessions](#memcached)
+
+The web is a stateless environment. This means that each request to your application is considered unrelated to any previous request. However, **sessions** allow you to store arbitrary data for each visitor to your application. The session data for each visitor is stored on your web server, while a cookie containing a **session ID** is stored on the visitor's machine. This cookie allows your application to "remember" the session for that user and retrieve their session data on subsequent requests to your application.
+
+Sound complicated? If so, don't worry about it. Just tell Laravel where to store the sessions and it will take care of the rest.
+
+Three great session drivers are available out of the box:
+
+- File System
+- Database
+- Memcached
+
+<a name="file"></a>
+### File System Sessions
+
+Most likely, your application will work great using file system sessions. However, if your application receives heavy traffic or runs on a server farm, use database or Memcached sessions.
+
+To get started using file system sessions, just set the driver option in the **application/config/session.php** file:
+
+	'driver' => 'file'
+
+That's it. You're ready to go!
+
+> **Note:** File system sessions are stored in the **application/storage/sessions** directory, so make sure it's writeable.
+
+<a name="database"></a>
+### Database Sessions
+
+To start using database sessions, you will first need to [configure your database connection](/docs/database/config).
+
+Already setup your database? Nice! Next, you will need to create a session table. Here are some SQL statements to help you get started:
+
+#### SQLite
+
+	CREATE TABLE "sessions" (
+	     "id" VARCHAR PRIMARY KEY NOT NULL UNIQUE,
+	     "last_activity" INTEGER NOT NULL,
+	     "data" TEXT NOT NULL
+	);
+
+#### MySQL
+
+	CREATE TABLE `sessions` (
+	     `id` VARCHAR(40) NOT NULL,
+	     `last_activity` INT(10) NOT NULL,
+	     `data` TEXT NOT NULL,
+	     PRIMARY KEY (`id`)
+	);
+
+If you would like to use a different table name, simply change the **table** option in the **application/config/session.php** file:
+
+	'table' => 'sessions'
+
+Great! All you need to do now is set the driver in the **application/config/session.php** file:
+
+	'driver' => 'db'
+
+<a name="memcached"></a>
+### Memcached Sessions
+
+Before using Memcached sessions, you must [configure your Memcached servers](/docs/cache/config#memcached).
+
+All done? Great! Just set the driver in the **application/config/session.php** file:
+
+	'driver' => 'memcached'