LF Demod streamlining

one shared location for demoding lf for arm and client.  also added a
few raw demod commands.

common/lfdemod.h

@@ -0,0 +1,28 @@
+// Copyright (C) 2014 
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Low frequency commands
+//-----------------------------------------------------------------------------
+
+#ifndef LFDEMOD_H__
+#define LFDEMOD_H__
+#include <stdint.h>
+
+int DetectClock2(uint8_t dest[], size_t size, int clock);
+int askmandemod(uint8_t *BinStream,uint32_t *BitLen,int *clk, int *invert);
+uint64_t Em410xDecode(uint8_t BitStream[],uint32_t BitLen);
+int manrawdemod(uint8_t *BitStream, int *bitLen);
+int askrawdemod(uint8_t *BinStream, int *bitLen,int *clk, int *invert);
+int HIDdemodFSK(uint8_t *dest, size_t size, uint32_t *hi2, uint32_t *hi, uint32_t *lo);
+int IOdemodFSK(uint8_t *dest, size_t size);
+int fskdemod(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t invert);
+uint32_t bytebits_to_byte(uint8_t* src, int numbits);
+
+//
+#define MAX_BitStream_LEN (1024*128)
+//extern int BitStreamLen;
+
+#endif