Lots of code cleanup (#32)

### Description
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### Will this Pull Request break anything? 
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### Suggested Testing Steps
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src/snes/cpu.c

@@ -8,8 +8,9 @@
 #include "cpu.h"
 #include "snes.h"
 #include "../types.h"
+#include "../ida_types.h"
+#include "../enemy_types.h"
 #include "../variables.h"
-
 static const int cyclesPerOpcode[256] = {
   7, 6, 7, 4, 5, 3, 5, 6, 3, 2, 2, 4, 6, 4, 6, 5,
   2, 5, 5, 7, 5, 4, 6, 6, 2, 4, 2, 2, 6, 4, 7, 5,
@@ -44,6 +45,8 @@ static void cpu_writeWord(Cpu* cpu, uint32_t adrl, uint32_t adrh, uint16_t value
 static void cpu_doInterrupt(Cpu* cpu, bool irq);
 static void cpu_doOpcode(Cpu* cpu, uint8_t opcode);
 
+extern Snes *g_snes; // for debugging
+
 // addressing modes and opcode functions not declared, only used after defintions
 
 static uint8_t cpu_read(Cpu* cpu, uint32_t adr) {

src/snes/snes.c

@@ -164,7 +164,7 @@ void snes_handle_pos_stuff(Snes *snes) {
   }
 }
 
-#define IS_ADR(x) (x == 0xfffff )
+#define IS_ADR(x) (x == 0xfffff)
 
 void snes_catchupApu(Snes* snes) {
   if (snes->apuCatchupCycles > 10000)
@@ -407,9 +407,11 @@ uint8_t snes_read(Snes* snes, uint32_t adr) {
 }
 
 void LogWrite(Snes *snes, uint32_t adr, uint8_t val) {
-  printf("@%d: Write to 0x%x = 0x%.2x: 0x%x: 0x%x: x = 0x%x, y = 0x%x, c = %d\n",
+  printf("@%d: Write to 0x%x = 0x%.2x: 0x%x: r18=0x%x: r20=0x%x: a = 0x%x, x = 0x%x, y = 0x%x, c = %d\n",
          snes_frame_counter, adr, val, snes->cpu->k << 16 | snes->cpu->pc,
-         snes->ram[0x12] | snes->ram[0x13] << 8, snes->cpu->x, snes->cpu->y, snes->cpu->c);
+         snes->ram[0x12] | snes->ram[0x13] << 8, 
+          snes->ram[0x14] | snes->ram[0x15] << 8,
+         snes->cpu->a, snes->cpu->x, snes->cpu->y, snes->cpu->c);
 }
 
 void snes_write(Snes* snes, uint32_t adr, uint8_t val) {