tree cf50b8d5a066c38558f7b75687a96cac0fec39b3
parent 235b0b5357142471d3550fa06e756f7e223237e5
author Marc Kupietz <kupietz@ids-mannheim.de> 1787319865 +0200
committer Marc Kupietz <kupietz@ids-mannheim.de> 1787319865 +0200

enable notes, search, menu and zoom plugins by default

reveal_plugins now defaults to c("notes", "search", "menu", "zoom");
pass NULL to render without plugins. Existing self_contained decks keep
working: the default set is dropped with a warning there instead of
triggering the hard stop, which still applies to explicitly requested
plugins.

Change-Id: I9041861a6914886e0c32ab5e37b8c4f55a5576c3