Create a route optimizer demo app that uses the JavaScript route stop optimization library

1. Use betweenPairs to get distances between stops in the route. Use same points in To and From parameters.

2. Call the route stop optimization library to solve TSP in the browser. This keeps it interactive instead of batch on the server.

3. To get a displayable route, request a route from the route planner for stops in the order given by the route stop optimization library.

Allow user to add/remove stops, using betweenPairs to get any new distances required. This will require two requests to route/distances/betweenPairs, one for forward distances (1 x N, N x 1). For example, given an initial route of from = {1,2,3,4} and to={1,2,3,4}, to add stop 5, make the following two betweenPairs request:
```
from={1,2,3,4}, to={5}
from={5}, to={1,2,3,4}