GraphViewer: Added function to toggle display of labels without redefining them
GraphViewer: Added new test for ZoomManager
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel
GraphViewer: Started with new interface for zoommanager with better integration of D3 and Fisheye
GraphViewer: New zooming-behaviour implemented, still open: FishEye
GraphViewer: Added fisheye distortion propagation to zoommanager.
GraphViewer: Main graphViewer class is now able to construct a ZoomManager
GraphViewer: ZoomManager now binds events to SVG not to first G, gives better results
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel