v0.508-alpha

• Changed file browser to native system file browser (thanks to: https://github.com/gkngkc/UnityStandaloneFileBrowser )
• Fixed flipped imported stratum mask
• Fixed flipped preview of stratum masks
• Added basic water settings
• Changes in water shader (support for all water settings)
• Improved generating of water data texture
• Editor now generate and render terrain normal texture
• Reduced terrain precision (thanks to terrain normal texture, for faster painting)
• Generating of water and normal texture is now done in background (no lag after finishing painting)
• Removed tilling of stratum and water masks (wrong mask color at borders of the map)
• New slope tool
• New bloom post process effect (more similar to FA)
• Added bloom value in lighting settings
• Fixed changing pages in resource browser
• Changed cursor when dragging textures from resource browser
• Changed UI rendering to pixel prefect