Slatted Cow Shed v1.3.0.0

Slatted cow shed is common in Ireland and UK:

Changelog: 1.3.0.0:
- added manure heap inside the shed.
- Increased cow Capacity from 100 to 150
- Increased feed capacity

- Price: 100000$
- Daily upkeep: 55$ / day
- Dimensions: 36 meter x 13.5 meter
- Capacity: 150 cows
- Water automatically full

Changelog: 1.1.0.0:
- new corrugated sheet texture
- added green colour option
- lights are now turned on by a switch.

Changelog: 1.2.0.0:
- modders can now add the placeable to their maps.