Move all code out of home.asm into home/

This results in 64 home/*.asm files, comparable to pokecrystal's 57.

home/count_set_bits.asm

@@ -0,0 +1,24 @@
+; function to count how many bits are set in a string of bytes
+; INPUT:
+; hl = address of string of bytes
+; b = length of string of bytes
+; OUTPUT:
+; [wNumSetBits] = number of set bits
+CountSetBits::
+	ld c, 0
+.loop
+	ld a, [hli]
+	ld e, a
+	ld d, 8
+.innerLoop ; count how many bits are set in the current byte
+	srl e
+	ld a, 0
+	adc c
+	ld c, a
+	dec d
+	jr nz, .innerLoop
+	dec b
+	jr nz, .loop
+	ld a, c
+	ld [wNumSetBits], a
+	ret