Refactoring low frequency operations, now 'lf hid fskdemod' is more stable. Also did changes to handling ioprox tags, this is yet untested, so until it's been tested it should be kept off 'stable' branch

client/proxmark3.c

@@ -47,7 +47,11 @@ void SendCommand(UsbCommand *c) {
       PrintAndLog("Sending bytes to proxmark failed - offline");
       return;
     }
-
+  /**
+	The while-loop below causes hangups at times, when the pm3 unit is unresponsive
+	or disconnected. The main console thread is alive, but comm thread just spins here.
+	Not good.../holiman
+	**/
   while(txcmd_pending);
   txcmd = *c;
   txcmd_pending = true;