Routing example is broken

[davidtheclark]

When I try to run it I get this error:

[12:52:11 underreact] Starting underreact in development mode. Wait ...
[12:52:11 underreact] ERROR: Could not find the entry Javascript file /Users/davidclark/dev/mapbox/underreact/examples/routing/src/index.js.

Error: Could not find the entry Javascript file /Users/davidclark/dev/mapbox/underreact/examples/routing/src/index.js.
    at main (/Users/davidclark/dev/mapbox/underreact/commands/start.js:25:11)
    at config.then.urc (/Users/davidclark/dev/mapbox/underreact/bin/underreact.js:121:18)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:189:7)
    at Function.Module.runMain (module.js:696:11)
    at startup (bootstrap_node.js:204:16)
    at bootstrap_node.js:625:3