Enhancements in color bar positioning and margins.

See merge request !134

Bumped to v2.7.0.

See merge request !133

Develop plot enhs

See merge request !132

Develop update plottimeseries

See merge request !131

Add boxes in PlotStereoMap fix issue #122

Hi,
I have modified PlotStereoMap to allow to draw as many boxes as wanted over a stereorographic map. This fixes issue #122 .
@nevensf and @cprodhomme would you mind testing it please?

See merge request !85

This reverts commit a44c326c.