Verdant Skies v1.5.4 - Important Internationalization fix

[*] Fix an issue where the game could fail to start a new game if your computer uses a period as a thousands separator - Thanks to Yuki and Gabriela for sending me logs and helping me debug this issue! - This was introduced in the dotnet update associated with the previous Unity engine ugprade. [*] Upgrade the Unity engine to version 6 to keep the game running long into the future [*] Some rendering performance improvements [*] Improve save loading speed and animations on title screen [*] Fix some overlapping text in the grinder's crafting menu. [*] Improve logging when bugs do occur. [*] Fix a minor controller/mouse detection issue on the title screen.