Several Changes in GUI, Sim procedure + BGap plot

Input from table to Qdot now stable, warnings for wrong inputs and
blocking of simulation.
Database GUI now sortable but only via StartUp.m
plotBandGap, plots Band Gaps of all Qdots (Legend not jet perfect)
Cleaned up my funtions and documented them
Merge branch 'Stage-1-GUI' into cdevelop
Changes in Stage-1-GUI
functions for visualising: 3D (ok) and along line (not finished)
plotAlongLine is working in principle. Loading the Qdots has still to be done.