Hack transform_smooth to work with dates
A little refactoring of bin
Re-document with roxygen2 3.0.1
Generalise bin_params and bin_vector
Tweaks to vignette
Use barchart in qvis if x is categorical
Fix incorrect variable name
Ugly hack to get qvis + barchart working
Don't make barchart bars occupy all the space
Add up_down and re-document
Allow NULLs in layer (silently ignored).
Fix typo
Remove spurious file
Rename mark_line to mark_path. Closes #80.
Add layers for all marks
Fix bug with mark_line/path
Default to se = FALSE for layer_smooth.
Closes #89
Use random plot id
Add knitr_print function
Autosplit doesn't split if no categorical vars
Unnest handlers