0.2.0

Changed

• improved water erosion algorithm
• thanks to egui 0.19, UI is now responsive and adapts to any resolution
• fbm generator is now multi-threaded and much faster
• export and load/save panels now use a file dialog instead of a simple textbox

Fixed

• seed is now set correctly when loading a project
• landmass works even if input is not normalized
• 2d and 3d previews work when loading a project with less steps than current project
• hills doesn't crash anymore when using radius variation == 0.0
• worldgen doesn't crash anymore if there is an error while loading/saving a project or exporting a heightmap