Added LF frequency adjustments from d18c7db, cleaned up code,

typo fixes in iso14443a code, added the missing "tools" directory,
added initial elements for online/offline detection for commands.

tools/srecswap.pl

@@ -0,0 +1,35 @@
+#!/usr/bin/perl
+
+# endian-swap S records; we need this because the JTAG tools we're using
+# expect the memory image in byte-swapped format
+#
+# Jonathan Westhues, April 2004
+
+if(@ARGV == 0) {
+	die "usage: $0 file-to-endian-swap.s19 > out.s19\n";
+}
+
+while(<>) {
+	chomp;
+
+	if(/^S0/) {
+		next;
+	}
+	if(/^S7/) {
+		print "$_\n";
+		next;
+	}
+
+	if(not /^S3(..)(........)(.*)(..)$/) {
+		die "bad S record at line $.\n";
+	}
+
+	$data = $3;
+	$checksum = $4;
+
+	print "S3$1$2";
+	while($data =~ m#(..)(..)(..)(..)#g) {
+		print "$4$3$2$1";
+	}
+	print "$checksum\n";
+}