move compile notebook to main toolbar; allow specification of format in call to renderRmd
include notebook format in prefs/options
change default notebook type to html
revert addition of format to notebook options
qualify rmarkdown format
compile notebook v2 options dialog
correct docs
use simpler regex for matching name of rmarkdown archive
Merge remote-tracking branch 'origin/master' into feature/pdfjs-refresh

Conflicts:
	src/gwt/src/org/rstudio/studio/client/RStudio.java