Ignore config.php

I thought it might be a good idea to make a config-sample.php which people can copy to config.php, and then ignore config.php in the .gitignore file. That way when you're developing, it's not always showing up as unstaged in git.

Wordpress does a similar thing with it's config file, but it also has a setup "wizard" to create a config file for you. But in the case of ICEcoder, it would be much more simple. All you would have to do is create config.php based on config-sample.php if it doesn't exist. And then since the password field would be blank, it would prompt you to create a password.