merged the giant crater into one tile
merged the bottom of the big rock
also a dead worm
category resorting
identical to the right two tiles from 443

BLOXICE and BLOXTREE redundancy
remove building bibs to avoid confusion
randomized bricks
categorize everything
fixed a crash in the actor border rendering
Merge pull request #4461 from chrisforbes/master-ping-thread-safety

fixes #4459
Merge pull request #4464 from pchote/attackmove

Add AttackMove to C&C helicopters
Merge pull request #4427 from Mailaender/d2k-tileset-cleanup

ARRAKIS tileset cleanup
use all tech center frames
setup all biolab frames
setup all hospital frames
fixed missing Requires: freetype2 on Red Hat & friends
Merge pull request #4470 from Mailaender/fedora-freetype

Fixed missing Requires: freetype2 for Fedora
Disables "building"-speech when nothing more can be built
Add Ripley` to AUTHORS
Merge pull request #4471 from Kanar/SoundFixes

Disables "building"-speech when nothing more can be built