xMath3_WIP (#410)

* Add template function xUtil_select to xutil.h.

* Filled in zNPCCommon struct with information from m2c decompiler.

* Edited pendlist and actvlist types to pointers.

* Modified existing functions to smooth additions.

* Added partial matches for FillPending, ReFillPending, NextPendingNPC, and StatforNPC. Also have outline for ClearActive in comments.

* zNPCCommon definition removed, now included from zNPCTypeCommon. Moved en_SM_NOTICES to zNPCTypeCommon to avoid recursive include.

* zNPCTypeDuplotron now pulls zNPCSpawner definition directly from zNPCSpawner instead of transitively via zNPCTypeCommon.

* Quick patches to data types after using more detailed definition of zNPCCommon.

* Revert pendlist and actvllist to not being pointers.

* Implemented suggested fixes to NextPendingNPC.

* Used Clang to format.

* Saw xMat3x3Identity was defined in Climate.cpp, added handle to header to import into xMath3.

* Moved xMat3x3Copy and xMat3x3Identity to imports from xClimate as they are defined there.

* Initial work on xMath3. Handles in header moved to cpp file and many are filled out.

* While working on xMath3, removed declaration for xMat3x3Copy and xMat3x3Identity because they were already specified in xClimate.cpp. Added declarations for them in xClimate.h and moved an import in zNPCGlyp.cpp.

* Revert to last commit.

* Rolled back from earlier commit (1f1bebd), xMat3x3Identity and xMat3x3Copy will eventually be moved to xMath3 most likely.

* xMat3x3Identity and xMat3x3Copy both present in xClimate but only in cpp. For other uses in game, use from xMath3, hence uncommenting.

* Additional definitions for things used in other xMath3 functions.

* Further progress on xMath3 functions, still WIP.

* Edited comments to be more accurate.

Author: daft7