Jonathan Wright

Checking for zero diagonal elements, translation and rotation functions and choosing particular sets of intensities

Translation search seems to work(!)

Re-factored single peak fitting code to separate model from optimiser

Gui still a mess, but now sidetracked by translation functions

Fix the wilsonepsilon thanks to Anders maths skills!

implementing ml in terms of "functors"

Work started on gui

Included Anders likelihood stuff - theory there, code next...