use standard deviation instead of variance in calculating heatmap
fix colours in average chart
add criteria variance analysis and average weights to average chart
refactored weight calculations to own class; add show average score; make average VC thinner; fix variance by score calculation
make abstract criteria header sizes thinner
changed wording of actions; add AVG value to header label when average weights are displayed
add show all users option to value function box plots; add right click to select all when initializing