Post launch fixes

• Fixed wrong texture effect on walls when they are buffed by crystal
• Walls are now easier to build, the collision check is now 50% smaller
• Replacing walls is no longer prevented by nearby objects, this should make replacing much easier
• Fixed bug where new guests would stop coming in a late game Zoo
• Challenges now should not be active in tutorial
• Tuned some animal attack ranges
• Added some backend support for potential mods