Remove old HSM (will replace with new one from github next)
Squashed 'Game/ZeldaDS/arm9/source/external/hsm/' content from commit b15f5be

git-subtree-dir: Game/ZeldaDS/arm9/source/external/hsm
git-subtree-split: b15f5be92a045c4d01b0146c7daad73c3fb7a18a
Merge commit 'ec4d72bf1051c902761caca09805f09f0de382b8' as 'Game/ZeldaDS/arm9/source/external/hsm'
Code compiles against new hsm, but doesn't quite run properly
Fix bugs related to hsm replace (boomerang, collision-based damage, etc.)