#821 Incorrect plaque tile gas values

This corrects the commemorative Goon plaque at the Arrivals Shuttle. It previously had the values of gas set low and an approximation of what the values should be. The temperature was also extremely low. This pull sets the values to the default of the other floor tiles.

Arrivals will become cold randomly, but not every round. The epicenter of this coldness is the plaque (thanks to dumpdavid for helping us figure it out). It is a map edited floor tile, it is the exact same as every other tile except it has its values edited on the map.

I am not sure if this will fix arrivals getting cold, but the values of the tile are an anomaly and should be reverted to the default values.

Map-merger died. Had to merge by hand.
Code by Zelacks