0.7.2 patch

Changed depth at which textures / assets will be initially placed (over instead of under)
Added possibility to duplicate texture / asset / collider with CTRL+D
Added Player-Only colliders to mapeditor and maps
Added possibility to scale assets on X and Y seperately (scale uniform by holding shift)
Fixed bug where bots all had the same skin
Fixed crash in map editor when swapping types
Fixed issue in map editor with textures
Fixed depth ordering for assets
Fixed possible bug in main menu when logging in