Added armor skin layer to HumanoidModel.cpp and HumanoidModel.h and adjusted skin box code to handle new armor layer. Added SkinOffsets.h with SKIN_OFFSET type. Added code to DLCManager.cpp, DLCManager.h, DLCSkinFile.cpp, and DLCSkinFile.h to read skin offsets from DLC skin packs (Does not affect skin yet). Changed Steve skins back to their original 64x32 size for parity with official LCE. Removed some redundant code.
Renamed all Alex skins and Developer Steve skin to match the official file names, reordered default skin to match the order in the official release of LCE, modified model type logic to be more optimized, added more anim flags to HumanoidModel.h, added code to show armor if the corresponding part is hidden but the "show armor" part anim flag is present, added code to handle extra skin box values of "hide with armor", "mirror skin box", and "scale", corrected player model second/overlay layer scale from 0.5 to 0.25, and fixed skin boxes not rendering on 64x64 DLC skins.
