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
Alcohol bugfixes.
Merge pull request #3128 from Segrain/master

Chemistry: alcohol bugfix.
Fixes #3125
Fixes #2957
Fixes #3052
Fixes #2740
Fixes #3131
Merge pull request #3129 from Zuhayr/master

Various fixes.
Merge pull request #3127 from SkyMarshal/master

Maploader improved: Now loads faster by skipping space tiles and properly parses lists from the mapfile.
excavation gear belts can now hold pick sets, pick sets can no longer hold hand picks (they spawn in the locker instead), picks and measuring tapes now work much faster

Signed-off-by: Cael Aislinn <cael_aislinn@yahoo.com.au>
depth scanner should now properly show the responsive material of a find

Signed-off-by: Cael Aislinn <cael_aislinn@yahoo.com.au>