Structure Templates Update 0.1.3

Updated:
-Chairs in Big FOB, Small FOB and Supply Compound (With A3 version, so
now are sittable according to Jani)
-Lights (once again)
-Big FOB now has one more building

Added:
-Concealed FOB
-Pre-Made Buildings (HQ, Small Briefing/HQ and Small Hospital)

Removed:
-Objects related with A3 Nature, just in case. May add back in future.

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