v0.3.4

Feature

• [CREAKING CHANGE] Change that the event for a summarized edge will only occur once per line, and include edge IDs contained summarized edge to an event object.
• Add support for contextmenu events. It catches right click same as the browser's contextmenu event.
  • view:contextmenu, node:contextmenu, edge:contextmenu, path:contextmenu
  • To disable the browser's standard context menu, you have to call event.preventDefault() in the handler.
• Add support for the view:click event.

Bugfix

• Fix a bug that edge:pointerover event not occurring in rect(circle) of summarized edges.
• Implement changing mouse pointer when the summarized edge is hovered (only it is selectable)