Add generic animation macros from EoC/AtS
Sync Aragwaith unit images with AtS

Sync up to AtS commit 5d0e642cd5321e9e60b29c92d673391d9f116f5e.
Protection ability affects own units of any lower level again

Ported from EoC/AtS.
Add Precision weapon special from EoC/AtS
Sync Aragwaith unit type WML with AtS

Sync up to AtS commit 5d0e642cd5321e9e60b29c92d673391d9f116f5e, EoC
commit 9dedeba7cddc2a027745c9994a917fdcb78ed341.