18 December 2007
+ Re-write for valgrind 3.3.0
+ Major change is to use Ordered Set instead of hash table.
  I only really did this because cachegrind made the change.
  Potentially a performance slowdown?
+ Added fldcw counting

19 December 2007
+ Update documentation
+ Release version 0.3

7 January 2007
+ Made the basic block lookup happen at instrumentation time,
  rather than at run time, significantly speeding up runtime.
  Thanks to Nicholas Nethercote for pointing this out.
  
8 January 2007
+ Release version 0.4

23 January 2007
+ Minor changes.
+ Clean up documentation
+ Release version 0.5