Basically rewrote the sound manager to handle and fix several features.

- Added random sound playing support for the interface and the creature actions.
- Made the configuration of spatial sounds and the buffer handling done
  per specialized object instead of using multiple shared pointers.
- Also tried better spatial attenuation and min distance values.
- Readd playing claimed tile sounds.

The implementation is still a bit naive in several parts but it's a much better
base for more.

Fixes #94, #52
Fixed several things as discussed with @hwoarangmy
Fixed the two iterators in the sound manager.

While on it, removed some duplicated code and renamed a variable according
to the code guidelines.
De-statify the Helper functions where possible.

As discussed with @hwoarangmy
Merge pull request #124 from Bertram25/development

Updated Danimal's new map to its latest version.
Merge pull request #118 from Bertram25/sound_fix

Basically rewrote the sound manager to handle and fix several features.
Factored some part of the sound manager to make it more reusable.

Also added WALK, HURT, and DYING possible creature sounds.