Added local copies of d3, dagre-d3, jquery 2.0.3, and the Source Sans Pro and OpenSans fonts.
Reorganized script and CSS tags so it's easier to switch between minified and non-minified, and between CDN and local sources.
Moved angular module wrapper code for 3rd-party libs into modules.js, and moved app scripts into <head>.
Break long string values after commas in the query plan popup.
Removed commented, unused code.
Added `iconURL` property to graph nodes, and modified `useDef` to create a new ID for each node..
Populate $scope.graphNodes from $scope.graph.
Added icon wrapper with labels for node type and table alias.
Replaced old defs with a def for each graph node.