* Mini improvements
* Fix some splits
* Remove last comma from enums
* Fix symbols
* Fix some headers and missing prototypes
* Replace most of f32 with float
* Replace most of Point3d with Vec
* Add missing esprite include with guard
* Add HuSetVecF to ext_math behind a guard
* More includes
common.h fully removed. common_structs.h incorporated into new game/gamework_data.h header along with parts of variables.h (Other parts were moved to more appropriate headers). functions.h split into unsplit.h and board_unsplit.h
