need to fix graph layout CSS
at least page loads with correct graph layout now
???
updated home page text
transitions betwween visually unrelated items now working (simple cross-fade)
fixed summary page bug
in ancestor to descendant case, zooming to edge paths works (but not node paths)
refactoring
need to use both starting and ending viewBoxes for graph drawing rendering
graph drawing render method now takes starting and ending bounding rectangles
fixed bug with container not resizing when going from descendant to ancestor, but need to refactor
Merge branch 'semantic_transitions'