hook_plot_custom() respects options$fig.show == 'hide' now @kohske
cat() the knit_expand() results
write the results in <pre></pre> because they contain ```, and the markdown package is buggy (not being able to treat ``` literally inside ````)
use n+1 backticks if n backticks were detected in the output
add a merge argument to render_markdown() so that the source and output blocks can be merged into one, per suggestion of Hadley
apply render_markdown(merge = TRUE) to a markdown vignette
add Textile to doc, and roxygenize
bump version