New resources and codes for Simpler

Today, I change all resources and codes of Simpler. In future versions, this theme will be more bright, clean and of course I keep it simple.

I replace all previous images with new images, change all codes for more flexible and easy for me to maintain it. The base color are red, white, and black.

Currently I am still developing it in my spare time, wait until everything is finished. You can see the changes I did on this page.