Add interactivity

[antoniomedrano]

Demo should be interactive. Proposed additions:

• Lightly display all-to-all connectivity upon load
• Solve when button pressed
• Move/add/delete points and re-solve

[glennon]

• I agree with the move/add/delete points. 👍
• All-to-all connectivity does not add anything, but would make an ugly map. 👎
• Solve when button pressed might be considered, but a better design that "just works" would be better. 😐