* Clean up town_draw_town_all
* Clean up town_draw_e_flag
* Clean up InitPlayerLoc
* Fix VS 2015 builds
* Clean up gendung_get_dpiece_num_from_coord
* Clean up town_draw_clipped_e_flag
* Clean up town_draw_clipped_e_flag_2
* Remove HIDWORD() as it is now unused
* Clean up ToggleSpell
* Clean up DrawLifeFlask and UpdateLifeFlask
* Clean up DrawManaFlaskm, control_update_life_mana and UpdateManaFlask
* Clean up CheckSBook
* Clean up DoSpeedBook
* Decompose magic numbers
* Clean up GetSBookTrans
* Apply spell_type
* Slight clean up of DrawSpellList
This improves the bin diff a little bit but more importantly gets rid of
_p*Spells[] usage in control.cpp