backup before populating wdist_calc.c
wdist_calc reorg
wdist_assoc stub
Fisher 2x2/2x3 exact test utility
bugfix
final-ish version of fisher23().  now to create variants of fisher22 to support mass association testing
--hardy bugfix
almost time to return to writing --assoc
basic --assoc/--fisher working
X/Y/MT
trend test
allelic test
basic --model complete