Quickfix for INFINIMEAT.
Merge pull request #3111 from Spamcat/master

MEATFIX
Merge pull request #3113 from Zuhayr/master

Firesuit icon fix.
Fixes #3106
Fixes #3118
Fixes #2921
Fixes #2421
Fix for destroying alien walls with your bare hands.
Merge pull request #3121 from Zuhayr/master

Alien resin wall fix.
Maploader improvements: Now skips space tiles, properly parses lists, commented and cleaned up.
beach.dmm is now unescapable.
Fixes #3114