cleaning up the-graph to get ready for svg
graph shows up
update svg version and lint
setPointerCapture and icons as svg first
polymer update
use pointergestures track for dragging
pinch zoom; needs work
edge preview shows up
pass width height to svg
move menus to own files
moving and removing nodes via the noflo graph object #71
generic show context event, center node context on mouse
edge menu and remove via #71
center context menus on hold point, requires hack to work around Polymer/PointerGestures#23
tap ports to connect #71
rename method edgeStart
tooltip on ports
port label font shrinks if longer than 1/2 node
make edge from context menu or port
TextBG class to fake bg for svg text