v0.519-alpha

• Fixed heightmap saving bug (rounding error)
• Fixed crash on creating new tables file with more than 5 armies
• Added warning if mass point or hydrocarbon is closer than 8 units to map border
• Editor now remove "gamedata/" from installation path if gamedata was selected instead of main folder.
• Removed snap to water height when creating new mass point or hydrocarbon
• Removed broken empty area in Areas Tool
• Added Playable Area Rounding option in Areas Tool. Displays area how they will look in game (because they are rounded to 4)
• Fixed missing some of the mipmaps for loaded textures for some formats (DXT3)
• Added support for BGR24 texture format (fix for many normal maps)
• Lowered brightness and saturation for slope colors