ebx: Remove laser tag mode

Remove laser tag mode I made where you run around shooting people with railgun with no items or weapon effects.

Mini-game mode that I added for fun. Never added to UI or mentioned it existed anywhere.
ebx: Remove unfinished BONES code from ui/ui_players.c

Already removed from cgame and q3_ui.
ebx: Fix compiling missionpack UI
ebx: Resync Item_Paint in ui_shared.c to mint-arena
mint-arena: Don't include menudef.h in ai_chat.c

I commented it out in Turtle Arena. Removed and still compiles, so went ahead and removed it.
mint-arena: Don't hardcode the list of near by items for bot chat

Use bg_itemlist and specifically ignore some item types instead of duplicating the names.

Obelisks are not in the item list, so name must still be hardcoded for near by items.
mint-arena: Use wrappers for accessing bg_itemlist

Turtle Arena uses BG_NumItems, BG_ItemNumForItem, and BG_ItemForItemNum to access item info.
Adding these to mint-arena makes merging between mint-arena and Turtle Arena easier for me.
ebx: Rename bg_iteminfo_t back to gitem_t

I renamed gitem_t to bg_iteminfo_t because it made more sense.
However, I don't feel like doing the same in mint-arena, so change it back.
Merge remote-tracking branch 'mint-arena/master' (plus notes)

Fixes bot reply to "where are you" when near a weapon.
Cleans up quite a bit. So many conflicts though...

Conflicts:
	code/cgame/cg_draw.c
	code/cgame/cg_ents.c
	code/cgame/cg_event.c
	code/cgame/cg_info.c
	code/cgame/cg_main.c
	code/cgame/cg_predict.c
	code/cgame/cg_weapons.c
	code/game/ai_chat.c
	code/game/ai_cmd.c
	code/game/bg_misc.c
	code/game/bg_misc.h
	code/game/bg_pmove.c
	code/game/g_active.c
	code/game/g_combat.c
	code/game/g_items.c
	code/game/g_misc.c
	code/game/g_spawn.c
	code/q3_ui/ui_controls2.c
	code/q3_ui/ui_players.c
	code/ui/ui_players.c