Release 2022.01.03

Upgrade instructions

From #3697 (Combine time-dep rotation maps):

If you want to use the 3D rotation map that uses quaternions, use Rotation<3> now instead of Rotation3D.

Merged pull-requests (8)

General changes (8):

• ComputeHorizonVolumeQuantities: expand some error messages. (#3702)
• Combine time-dep rotation maps (#3697)
• Separate CachedTempBuffer from computer (#3686)
• Enable subcell for Newtonian Euler (#3648)
• Minor retroactive fixes for subcell codes (#3705)
• Add MC reconstruction for GH+GRMHD (#3643)
• Miscellaneous control system changes (#3706)
• Add void dimensionful_spin_magnitude free function to StrahlkorperGr.cpp (#3671)

Contributors (7): @markscheel, @knelli2, @nilsleiffischer, @kidder, @yoonso0-0, @nilsdeppe, @MarloMo