new pres icons
remove flag
Revert "remove flag"

This reverts commit fcdcfc44571ff1996edda7be30efd184ac031c8d.
new help icon
pres icon and file associations
don't render graphics changes in the background if there has been a change over the last 50ms
display row.names in data view
only execute quit hook if we're at the default prompt
Merge branch 'master' of github.com:rstudio/rstudio
dispatcher and media renderer
remove flag

This reverts commit e34c3bccc84ca81d7b7c163897b526c2d0e38be8.
update .gitignore
check for no preamble before appending
tweak slide zoom level