Upgrade to iron 0.4

[ivanceras]

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[jmealo]

@ivanceras: Can you flesh this issue out a bit please? Kudos on the project!

[ivanceras]

The 0.4.0 version of iron seems a bit off and I don't get the idea behind the routeID where you specify the name of the route? seems like a useless feature that adds more work on the library users.