use htmltools API for html dependencies
Merge remote-tracking branch 'origin/htmltools-refactor'
add www-address option to session
require R 3.0 on all platforms for rmarkdown v2
don't use repository field to indicate rstudio as package origin
require more recent version of shinyapps
remove unused allowRmdDeployment flag
force unload packages as required for dependency manager update
merge from master

Merge remote-tracking branch 'origin/master' into feature/packrat-integration

Conflicts:
	src/gwt/src/org/rstudio/studio/client/workbench/model/SessionInfo.java