v0.9.6

AlgebraOfGraphics v0.9.6

Diff since v0.9.5

Merged pull requests:

• allow combining histogram with visual(Stairs) (#591) (@simeonschaub)
• Unit support (#619) (@jkrumbiegel)
• MarkerSize scale ticks (#621) (@jkrumbiegel)

Closed issues:

• MarkerSize issue (#569)