v0.16

added zombie health
added continue/retry button on afterscreen
military now shoot zombies within range
fixed bug where some achievements didn't register
fixed bug where achievements would cause next level to crash
added lines to show where military shoot
various small bugfixes, may or may not have been related to new features
in v0.16
killing the attacking zombie will stop military from turning
zombies no longer walk through walls
military now only target zombies in the same room (broke it i think)
reworked civilian AI logic:
- added .targetX and targetY to zed arrays
- add .targetDirection to civ/mil/zed arrays
- add .target to civ/mil/zed arrays
now civs actually walk through doors properly(ish)