* data for c_angle
* data c_sxyz
* partially migrated c_xyz data
* c_xyz data
* c_xyz data decomp
* c_math data
* c_math data
* c_lib data, some cleanup
* rename some unnamed functions and create header for them
* header for string functions
* format and fix fabsf
* cleanup
* remove more unneded function prototypes
* move fpclassify to math.h
i previously had a bad habit of using double underscores in include
guard macro names, which are implementation-reserved per
the C++98 standard (see 17.4.3.1.2 Global names).
Co-authored-by: Pheenoh <pheenoh@gmail.com>
lepelog