Fix previousOwner bug

Game did lose data of prev owner.
Fix readme line breaks
Coup-de-grace

Bullet that hit floor or object damage stuned unit in that tile.
Environment damage to stuned units.
Readme update
Reduce morale lose in large aliens forces

Aliens grain new modifer based on head count.
Morale change is divided by `max(6 * alienCount, 100)`
instead of original `100`.
Refactor of fixed weapons

Fix bugs with terror unit spawn item set.
randomize smoke anim frames on load
add female flag to unit rules
respawning isn't a specab
add specab burn and explode
add error for overtall units
reduce psi strength growth

one attack shouldn't give that much
fix diagonal LOS
fix for terror sites in new battle
use correct loftemps file for tftd
un-hardcode the race of the next stage of a mission
fix vapor probability
tidy up some includes
fix ground timer oversight