eliocamp/metR: metR 0.9.0 - Cirrus fibratus

New Features I'm very happy with discretised_scale(), which is a type of scale which takes a discrete values that are the result of some discretisation and treats them as continuous. It's, in a sense, the inverse of the new ggplot2::binned_scale(). Whereas. ggplot2::binned_scale() takes continuous values and then discretises them, discretised_scale() takes discrete values which where the result of some discretisation procedure (such as the levels of geom_contour_fill()/ggplot2::geom_contour_filled()) and allows you to treat them as continuous. Related to that, geom_contour_fill() now gains a new computed aesthetic called level_d, which is the same as level but forces ggplot2 to automatically use the new discretised scale. AnchorBreaks() gains a bins argument to mimic the default functionality of MakeBreaks(). New label_placement_minmax() to label contours at the maximum and minimum points of a contour (mimicking isoband's behaviour) geom_contour_tanaka() now has a (rather experimental) argument smooth which allows to smooth the transition between segments. Bugfixes Fixes error introduced in previous version when geom_arrow() had mappings other than dx and dy. (Thanks Santiago!) The level derived aesthetic from geom_contour_fill() now returns and ordered factor with the correct labels that can be interpreted by ggplot2::guide_colorsteps(). This might a breaking change! geom_label_contour() lives! The previous release rewrote much of the way geom_text_contour() worked, but I messed up and didn't realised that the new code had broken geom_label_contour() (to be honest, I'd almost totally forgotten about it :P). (fixes #126, thanks @kongdd