Rename the poorly named {Read,Write}BigEData to Copy{From,To}Emu -

and change argument order to match memcpy.

Oh, and fix a lulzy buffer overflow in IOS emulation while I'm at it.

Source/Core/Core/HW/Memmap.h

@@ -120,11 +120,11 @@ void Write_F64(const double _Data, const u32 _Address);
 
 std::string GetString(u32 em_address);
 
-void WriteBigEData(const u8 *_pData, const u32 _Address, const size_t size);
-void ReadBigEData(u8 *_pDest, const u32 _Address, const u32 size);
 u8* GetPointer(const u32 _Address);
 void DMA_LCToMemory(const u32 _iMemAddr, const u32 _iCacheAddr, const u32 _iNumBlocks);
 void DMA_MemoryToLC(const u32 _iCacheAddr, const u32 _iMemAddr, const u32 _iNumBlocks);
+void CopyFromEmu(void* data, u32 address, size_t size);
+void CopyToEmu(u32 address, const void* data, size_t size);
 void Memset(const u32 _Address, const u8 _Data, const u32 _iLength);
 void ClearCacheLine(const u32 _Address); // Zeroes 32 bytes; address should be 32-byte-aligned