fix #4227
fix typo in a86a2aa6
fix #4224
fix #4228
fix #4233 (the damage part)
addendum
addendum #2
fix camera singularies
fix #4177, fix refactoring mistake in a86a2aa
update submodule shard & pr-downloader
fix #4237

remove the 'loadingUnits' boolean from HAMT because it
was true if and only if 'forceHeading' was set by TCAI
workaround #4238
fix #4238
fix #4242
fix #4241
nothing important
update / cleanup releasechecklist.txt
update shard
Merge branch 'release' into develop