[Mod] Nether [nether-pack]

This is a modified version of lkjoel's nether mod.<br/>
Thanks a lot to LeMagnesium, crabman77, Ombridride, Gael-de-Sailly, ObaniGemini and other people from server-minetestforfun for working on this mod.

**Depends:** see [depends.txt](https://raw.githubusercontent.com/HybridDog/nether-pack/master/depends.txt)<br/>
**License:** see [LICENSE.txt](https://raw.githubusercontent.com/HybridDog/nether-pack/master/LICENSE.txt)<br/>
**Download:** [zip](https://github.com/HybridDog/nether-pack/archive/master.zip), [tar.gz](https://github.com/HybridDog/nether-pack/archive/master.tar.gz)

a long time ago this happened<br/>
![I'm a screenshot!](http://i.imgur.com/pMZYqt9.png)<br/>
I assume other screenshots could represent this mod in more serious ways

If you got ideas or found bugs, please tell them to me.

[How to install a mod?](http://wiki.minetest.net/Installing_Mods)


TODO:
* Find a way to get the perlin noise inside [-1; 1] or use another noise
* Add some node which containing items to the simple pyramid "buildings"