Strong Arm, Water Sport, and more HMs.

This adds Rock Climb functionality to Strong Arm and Dive functionality to Water Sport, as discussed in the server. HMs have been added, but we need 16bit Items to add Wind Ride, and I haven't finished their functionality.

The Rock Climb tile is a bit terrible, it's not easy to notice. Maybe change so that it works well with yellow or another colour?

This does not build due to issues with effect_commands.asm, but since Zeta is meant to be working on the mapping and Water Sport anyway, it seems to be up his alley.

I ported over much of the underwater assets Rangi was using as they looked very pretty. I imagine it'll be fun to utilise going forward. May as well, right?

I shall now lay down in a dark room.

Review: c21561ea71 (diff-5508f3b794fc68821ba35e94b6a293b2aaaa16c02a1b34fac70d03fd2f74c4b2R113)

macros/scripts/battle_commands.asm

@@ -181,6 +181,7 @@ ENDM
 	command startloop               ; ae
 	command curl                    ; af
 	command coinhurlpower
+	command doubleunderwaterdamage
 DEF NUM_EFFECT_COMMANDS EQU const_value - 1
 
 	const_def -1, -1

macros/scripts/events.asm

@@ -1054,6 +1054,30 @@ MACRO getname
 	db \1 ; memory
 ENDM
 
+; divemap macro.
+; When adding a divemap to an area, you do it like so;
+;		callback MAPCALLBACK_NEWMAP, .DiveMap
+;.DiveMap:
+;	divemap MAPCONSTHERE
+;	return
+; Got it?
+
+	const divemap_command
+MACRO divemap
+if _NARG == 1
+	divemap \1, 0, 0
+else
+	db divemap_command
+	map_id \1 ; map
+	db \2 ; delta x
+	db \3 ; delta y
+endc
+ENDM
+	const divewarp_command
+MACRO divewarp
+	db divewarp_command
+ENDM
+
 	const wait_command ; $a8
 MACRO wait
 	db wait_command