this is going to take a while to get right
not getting far but too tired to be sane

need to experiment with stick figure model only
at least the stick figure works now

except left and right are swapped!

also NB that the coordinates aren't being drawn the correct alignment
coordinate system rotations are (perhaps) sorted
ellipses rotate!
use a text file for measurements and read it in
correct shoulder plotting (with a hack, for now)
Merge branch 'move'

Conflicts:
	person_plot.m

trivial changes to resolve
rationalise functions!

somewhat tidier
may need to think of some literate approach to document this stuff
it's getting complex!