Add to_route() to Switch trait.

[hgzimmerman]

Is your feature request related to a problem? Please describe.
It would be nice to convert an item that implements Switch into a Route. This way, handling naked Strings won't be required at all when using the router.

Describe the solution you'd like
Switch could gain a to_route_builder() method.
This may create a new RouteBuilder type that works with &str instead of String to avoid excess allocations, and finalizing it will create a Route.

A ToRoute trait might be added as well, denoting all types that can be converted to a Route. Similarly, extraction from Strings into Routes might require breaking off from the current Switch trait, and delegating that to another trait (TryFrom<&str>??).

Avoiding every primitive that currently implements Switch getting to_route() might make sense as well, because you need to have leading slashes for any of the routes to make sense (you wouldn't want a String to turn itself into a Route, because the resulting item won't have a leading slash).

[hgzimmerman]

closed via: #108