thank you for using my grid system.
Unfortunately it been almost 2 years since I've made it and it hasn't been updated for a very long time so yes it is little bit outdated. I don't have an intention to maintain or update it in the future because I started using little bit modified and improved version for my own purposes. Maybe in the future if I find free time I will release it.
If there is something missing or what you don't like about my grid fell free to update / change it. It's up to you. The best is probably keep original grid as it is and extend it in your own CSS file.
Maybe if there are more things for you to change you could try to check other grids / frameworks. I'm sure you will find one you will fit to your needs better.
Cheers Matt