[nether] Update

- For #351

mods/nether/README.md

@@ -0,0 +1,21 @@
+[Mod] nether-pack [nether-pack]
+
+This is a modified version of lkjoel's nether mod.  
+Look here if you want to see the differences:  
+https://github.com/HybridDog/minetest-nether/compare/lkjoel:master...master  
+Sadly lkjoel's one disappeared…
+
+**Depends:** see [depends.txt](https://raw.githubusercontent.com/HybridDog/nether-pack/master/nether/depends.txt)  
+**License:** see [LICENSE.txt](https://raw.githubusercontent.com/HybridDog/nether-pack/master/LICENSE.txt)  
+**Download:** [zip](https://github.com/HybridDog/nether-pack/archive/master.zip), [tar.gz](https://github.com/HybridDog/nether-pack/tarball/master)  
+
+this happens really selden to me  
+![I'm a screenshot!](http://i.imgur.com/pMZYqt9.png)
+
+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