outline of an import page
Merge branch 'develop' into import-notebooks

Conflicts:
	htdocs/js/rcloud_bundle.min.js
	rcloud.support/R/ocaps.R
	rcloud.support/R/rcloud.support.R
artifacts
Merge branch 'develop' into import-notebooks

Conflicts:
	htdocs/js/rcloud_bundle.min.js
	rcloud.support/R/rcloud.support.R
remove cruft
new editor.add_notebook entry point

allows adding a notebook to the tree without selecting it
complete backend support for notebook import

add prefix parameter for putting notebooks into folder
rcloud.port.notebooks returns a named list of imports and their results
add import notebooks to UI

bootstrap dialog and menu item
sends succeeded imports to editor notebook tree
failures not handled (for lack of a simple dialog)
artifacts
remove defunct import page

now handled by a dialog
put github features into Advanced menu

this also splits Advanced and Logout onto the right side
(not sure if that's a good idea, just trying it out)

Closes #152