Customisable controls + polish.

Hi!

we've made a small update. major changes include:

• Customisable controls: you can change the keyboard layout in menu
• Waterfall and river sounds
• Upgrade menu overhaul
• fixed bug where beefalo would crash the game
• Day 6 is now slightly weaker
• lots of small tweaks

Hope this helps ya'll enjoy the game more. Have a good day.

-Faxdoc