changed name of data to exampledata
fixed up legend
fixing up readme example w/ new legend
fixed bug w/ jitter
fixing geom_density example
Merge pull request #1 from hernamesbarbara/master

smoothers
basic working version of scale_colour_gradient
added alias for scale_color_gradient
Merge branch 'scale-color-gradients'
Update README.md
Update README.md
adding support for mid color