Patch v 1.3.1

A few more changes have been made to FTF for version 1.3.1.

• An error in physics based explosions has caused some re-rebalancing

• The option to remove walls has been added

• Error with the building selection menu changing buildings has been fixed

• Small changes to remove unneeded physics components - minor performance boost

• Balloons have a better and more fiery death!

There is a known issue with AI buildings burning down before all surrounding flags are gone. A fix to this will hopefully becoming soon.