NodeJS compatibility; transitions; bug fixes

v0.6.4 - IE9+ ok, manhattan, attr() with paths, fitToContent(), link …

…tool-options, Dagre v0.3.0, bezier with no vertices

JointJS v0.6.3

bug fixes + graph.resetCells() for much faster bulk insertion of cell…

…s to the graph

Version 0.4 - last commit

jsdoc comment edits; api reference styling; last www templates updates