Cavernreach Demo Patch 0.9.3 Update

The demo has been updated to Demo v.0.9.3. This patch has fixed some bugs and a few improvements overall to the game/demo.

-Fix: Menu issues where escape would not exit the menu under certain circumstances
-Fix: Lighting issues / Light baking artifacts on geometry
-Fix: Game crashes due to certain users experiencing spikes in GPU workload due to texture memory consumption. Mostly due to the lighting/lightmap issues noted above.
-Fix: The UI now hides properly during dialogue

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Update: UI improvements
Update: Added the ability to adjust the brightness/exposure in the Options menu
Update: Added some ground critters for game immersion
Update: Added some wildlife ambiant sounds for game immersion