add infrastructure for performance timing
initial support for showing performance inside rendered document
check for null before accessing cache_dir
bump version
fix #101: pass render args by name when generating multiple formats
sort timings; use CSS to style timing popup
clear performance timings before render
show simple data bars; document performance timers
Merge pull request #102 from rstudio/feature/performance-timing

Make render performance visible in Shiny documents
bump version
Merge branch 'master' of github.com:rstudio/rmarkdown
show a loading indicator while Shiny documents are rendering
initial implemention of temporary directory-based caching of static Rmd
light refactor of ::run
factor server function from ::run
bump version
maintain resource path across R session restart
document digest dependency
Merge pull request #105 from rstudio/shiny-static-caching

Add simple caching for static docs
detect request for R Markdown using tools::file_ext