- background terrain with collider can now be ignored when placing tower.
- change how the wave count is adjusted in SpawnEditor so it's less error prone.
- add interface to remove a particular wave in spawnEditor without having to compromise the whole list.
- added facility for OnGUI() based UI to use custom skin.
- fixed bug where path-finding not working when using PointNBuild mode on platform with more than 1 path.
- fixed bug in spawnEditor where resource gain for each wave is not copied correctly when adding/removing wave.
- fixed bug where path wont reconfigured when a tower on buildable platform is destroyed by creep.
- fixed bug where building status overlay wont disappear when a tower is destroyed while being built, unbuilt or upgraded.