Adding hooks to distinguish over/out mouse events
Basic split-panel view of argus versus provenance
Resolved conflicts from last merge, plus tweaks
Revised colors for argus view, to improve clarity.

This shifts the argus tree view into a distinct "monochrome" look, to
set it apart from the surrounding page (and even its own anchored
controls). Also added a transparent background for the anchored
controls, so they're clearly legible if controls overlap the scrolling
tree view.
Tweak to argus label color (distinct from paths)
Fix for 'parentNode is null' errors due to scroll-binding.
Smarter properties panel, w/ resize and toggle
Adding a tree description to the top of the page
Tweaks to header spacing
Merge branch 'master' into provenance-display

Conflicts:
	webapp/static/js/treeview.js
	webapp/static/plugin_layouts/opentree/default.css
	webapp/views/default/index.html
Merge pull request #12 from OpenTreeOfLife/provenance-display

Initial provenance display (property inspector) UI, misc cleanup