finish README

# Let's start

Okay, this git is simply PHP login for beginners.
## Making custom only-members-page

Add **first to your document**

``` php
<?php
# Starts the session (without this sessions don't work)
session_start();
# If user doesn't have session
if (!isset($_SESSION['API'])) {
# Redirects user to index.php
header('Location:index.php');
# Stops reading the file.. =)
exit;
}
?>
```
