Starting to make drag&drop working again
Merge branch 'master' of github.com:mytestbed/labwiki

Conflicts:
	lib/labwiki/plugin/plan_text/resource/css/plan_text.css
D&D of graphs seem to work again. It now also writes a description of the inserted widget into the underlying file. But there is still a bit of work left to make those pages stand alone (primarily on the Job Service side)
Fixed nterference from OMF Web style sheet. Not sure why we didn't give that a distinct name.
Better reporting of LW window resizing.
Fail quickly if plugins aren't properly configured.