Bugfixes and multiple graphs

Are your graphs getting too big to be understandable?  Try the new Tunnelling feature to split your calculation into multiple graphs!

• With nothing selected, click Switch Graph to rename your current graph, create a new graph, and/or navigate to another graph.
  
• With a node selected, click the Branch Tunnel button to create a new node on a new graph, connecting it from your current node.  Root Tunnel does the same thing, but with the connection going from the new node to the existing one.
• When a node is a tunnel to another graph, it will be a marked as a different color.
• With a tunnel node selected, click Remove Tunnel to remove its connection to the other graph.
• Double-click a tunnel node to quickly navigate to the graph it is connected to.
• Inactive graphs will process calculations as normal.

I've also made lots of fixes/improvements to the UI over the last few months, including:

• (Finally!) fixed the bug where there was a dead space on the screen in the WebGL version
• Create a new node and connect it to your existing node with either a Root or Branch command.  Root connects from the new node to the old one; branch connects to the new node from the old one.
• New toggle to hide probability #s under the nodes when you are just building out your graph and don't want to calculate anything.
• Standalone version is up-to-date with the WebGL version

If there was something annoying you the last time you used this application, now is a good time to try again.