Feature Request: Ability to place fences in game

[CarpetCrumbs]

I've noticed that you can only place fences in scenario editor and not in-game. It's a good scenic object and can be useful if you feel up to making your game look neat (side note: this would also be a good idea for misc buildings)

[YetiWiz]

Also, placing them alongside tracks/roads (On the same tile, not the adjacent one). This could be useful for example, when building highways and you want to separate the roads with a barrier in between without leaving a block of space.

[AaronVanGeffen]

This has already been implemented by #163.