Merge branch '26-misc' into 28
initial implementation, not tested
fixes, now works
only do NA/NaN check for %*%, not [t]crossprod
updates to R-admin: eg, saying more optimisitic things about OS X ad Windows
Merge branch '21-manual' into 28-matmult-na
Merge branch '28-matmult-na' of https://github.com/radfordneal/pqR into 28-matmult-na
update help files
Merge branch '28-matmult-na' into 29