FT-300 Fix an issue where `free' calls on blocks created during
create_from_blockpairs would crash the replay. Also fix parsing bugs.
FT-309 Control heat zone and padded fit size via environment variables
FT-300 Gather simple trace stats during the first canonical trace replay
FT-300 Print terse results when verbose = false
FT-300 Add mean / stddev tracking for block allocation sizes to
ba_replay
FT-309 Change the way padded-fit allocation alignment works
FT-300 Use portable printf format strings in the block allocator's
tracing code
FT-300 Report before and after fragmentation reports so we can see how
fragmentation changed
FT-300 Proceed with leaked allocators, so that we can partially anaylze
a running trace (that is, a trace that is still getting written to by some
process)