Unstatic P_SpawnThokMobj.
Add P_SpawnThokMobj to header to fix function globally.
Add P_SpawnThokMobj to Lua base library.

I don't know too much about this but I THINK I did it right.
Update p_user.c
Add P_SpawnSpinMobj.
Add P_SpawnSpinMobj to base library.
Fix a previous derp and add the two previously added functions to the bottom list.
Typo fix.
Add P_DoSpring to base library.
More unstaticing!
Wow, I can NOT type.
Give P_DoSpring a header.