Building's North-to-South alignment was never defined

[mokun]

Is your feature request related to a problem? Please describe.

• It's unclear if what width and length mean for each building in buildings.xml.
• One has to look at the svg image to figure out the North-to-South alignment of the width and length of a building.

Describe the rationale

• Provide explicit definition on whether the width or length of a building is N-to-S aligned.

Describe the goal(s) you have in mind

• Explicitly define the N-to-S alignment for each building.

Describe the solution you desire to see

• Add an attribute for each building in buildings.xml to explicitly define the
  N-to-S alignment.

Screenshots

• Server Farm's svg image is oriented as follows :
• width is 9 m
• length is 7 m
• It's short edge (aka the length) is N-to-S aligned.
  

	<building type="Server Farm" width="9.0" length="7.0" base-level="0"
			wear-lifetime="3340000" maintenance-time="150" room-temperature="18" base-mass="4000"
			category="LABORATORY">
		<description>
			The Server Farm is a computer facility providing mainframe resources and networking
			nodes for colony-width computing needs.
		</description>

• Command and Control's svg image is oriented as follows:
• width is 7 m
• length is 9 m
• It's long edge (aka the length) is N-to-S aligned.
  

    <building type="Command and Control" width="7.0" length="9.0" base-level="0"
    		wear-lifetime="3340000" maintenance-time="150" room-temperature="22.5" base-mass="4000">
    	<description>
    		The Command and Control is a communication facility with networking
    		capability for high speed communications and colony-width connectivity.
    		It also coordinates EVA operations.
    	</description>

**Specifications**
- post 3.7.0 build 9160

**Additional context**
- This would help defining the orientation of the construction site during Construction Mission as well as the incoming building from a resupply mission.