Use unit() to fix legend width in cm instead of relative size and remove comment that gave more space to the first bar plot

Improve function PlotForecastPDF

See merge request !28

Add hatching function

See merge request !33

Fix contour alignment in VizEquiMap.R

See merge request !32

Caption feature for VizEquiMap.R

See merge request !27

Add CONTRIBUTING.md

See merge request !29