square plots, no warning for toRGB(NULL), layout on right
test for legend entry order
Merge branch 'master' of https://github.com/ropensci/plotly into ggplotly
begin re-write
legend sort test, linetype test, name test, polygon test, size test
do not use x/y scales for legend ordering
path different from line
test polygons and paths
doc updates, passes checks
geom2traces doc
test colored lines, closes #6
Merge pull request #10 from ropensci/ggplotly

better api and more testing for ggplotly