Sequential HM version.
WIP
Add HMPar.hs
Add new hacked up ver
Add unsafe coerce
finishing up HMPar2
WIP on HMSeq
WIP
Finish up debugging HMSeq
Remove cruft out of HMPar2.
Remove spurious files; renames
Add main functions/big calls
Remove parallel occurs check
switch to word64 var names
remove normalization in parallel HM
use AtomicCounter for var names
Minor bit to check cpu affinity
cabalize