slight improvements to perlin noise
Merge branch 'master' of git://github.com/dalibor-frivaldsky/libnoise2
Merge branch 'master' of git://github.com/dalibor-frivaldsky/libnoise2
Merge branch 'master' of git://github.com/dalibor-frivaldsky/libnoise2
Merge branch 'master' of https://github.com/dalibor-frivaldsky/libnoise2