Why another isaac lib?

[AgCaliva]

Hi there! sory but i dont have technically so deep knowledge about ISAAC, why you implemented it again using rubycon original as base? what you wanted to accomplish and what are the differences between this lib and rubycon´s? TY
Edit:
Sory i have carefully readed readme, and now i understand, but it seems like you simplified a lot the code, this cant be bad for security? how can we know if this implementation its less, equal or more robust than original?
Sory for my questions, ty so much!