Added static class to work with .ase files.

I've created class which can read and write .ase files used by Photoshop (or some other programs) to store and exchange palettes:
![image](https://f.cloud.github.com/assets/2697754/2458732/55e47872-af50-11e3-9bab-64fae977854c.png)
Returned result of reading or argument of writing is the HashMap<String, Integer> where String is color name and Integer is color's int representation.

I think it can be used for automatic storing user's world biomes into palette with a single command:
/tc \<world\> palette
making a biomes.ase file (I suppose biome name should be used for color's name).

I didn't integrate it into TC, just added into util folder because I'm afraid I can break something and I hope you can call it from the right place.

Using of .ase file as a source to world's biome colors is also possible but a subject to discuss.