v1.1 - minor credits fix

While looking at scripts for a potential future project, I had a horrible realization: when I released IT IS YOUR BIRTHDAY, I neglected to credit the authors of the scripts I used.  I have now amended the game's credits to include the necessary attributions. I sincerely apologize to mjshi and modern algebra for using their scripts without credit, and I encourage other RPG Maker devs to check out their work if you're in need of scripts for your next project (and remember to credit them if you use it!!):

https://mjshi.weebly.com
http://rmrk.net/index.php/topic,44527.0.html