04:10 asami 

Convert category math to new layout.  

00:32 will 

Add physcalc (unversioned), an extremely old (apparently first written   in
1990), but still quite useful and flexible calculator.  Basically it's  
units(1) on steroids.  Also added patches to make physcalc secure (who   knows,
someone might make a cgi interface to it); also allowed it to   actually read
its *.phy files in another directory.