The flux pattern matcher will now preserve leading zeroes (although it can't

match them). The IBM decoder is now properly converted, autodetecting FM and
MFM.

lib/fluxmap.h

@@ -13,6 +13,7 @@ public:
     {
         unsigned bytes = 0;
         unsigned ticks = 0;
+        unsigned zeroes = 0;
 
         nanoseconds_t ns() const
         { return ticks * NS_PER_TICK; }