Version 1.13.1 released

Hot fix for a new serious bug introduced in v1.13. A tiny, small change in the game over screen made it crash whenever it pops up. Just a single character was incorrect. This warrants an immediate hot fix. In addition a few smaller bugs were fixed.

– [fix] v1.13 introduced a new bug, the Game Over screen crashed the game.
– [fix] Some water tiles around deep north also caused frost damage.
– [fix] One tile in Silent Forest was not properly marked as part of the the Silent Forest.
– [fix] Several small spelling fixes.