Improved list UI; proper test for leaf nodes
Cleanup and standardization of list displays
Right column changes with the chosen curation tab.
More cleanup of tabbed panels; example notes.
Initial test of modal popup (tree viewer)
Cleanup of study-list view, to match other lists
Merge branch 'master' into simple-curation-app

Conflicts:
	curator/static/css/default.css
Merge pull request #119 from OpenTreeOfLife/simple-curation-app

Improvements to layout, right column, and all list displays