Written beginning of FFF convertor. Still needs lots of units adding plus various cleanup etc.
Split unit definitions out to separate file.

I think there's a bug somewhere as 50 W in^-3 comes out with the wrong dimensions but I can't figure out why
Found it- misdefined units for W
Echos back interpretation for verification and redefined fir.mass to remove ambiguity with firkin volume
Written a greasemonkey script that gets rid of a load of bits of the squadlist rowing system that I never use