ADD: @marshmellow42 's fixed version of the ISO11784 FDX-B

ADD: crc16_ccitt_rev  (reverse version of crc16_ccitt 0x0000)

client/util.c

@@ -453,3 +453,18 @@ void xor(unsigned char * dst, unsigned char * src, size_t len) {
 int32_t le24toh (uint8_t data[3]) {
     return (data[2] << 16) | (data[1] << 8) | data[0];
 }
+
+
+uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
+	
+	int i = start;
+	int j = len-1;
+
+	if (len > 32) return 0;
+
+	uint32_t tmp = 0;
+	for (; j >= 0; --j, ++i)
+		tmp	|= bits[i] << j;
+
+	return tmp;
+}