changed noise

this is a different noise generation that looks more natural as Perlin designed also included simplex noise function/ability... this only requires one fix. which is to call noiseSeed(any random int); in setup otherwise noise will be all 0's and if the 3rd variable changes too quickly it might not render correctly but if all goes well it looks like this...
![image](https://f.cloud.github.com/assets/3231573/521548/7b2edc0c-bfb5-11e2-88b6-2a2139ecc51a.png)