Allow setting default values for Verbs

[rhaist]

I did not find the possibility to set default values for Verbs.
Maybe this is just missing in the documentation.

[surma]

It is in the docs, but it is just a comment in an example, so definitely not top-level enough. Will fix. Thanks for filing!

[rhaist]

In the docs there is only a way to set top-level parameters. But what if you want to set a default for Verb.Delete.Path ?

[surma]

Same thing. Use the initialization value. You might have to define a separate type for the embedded structs to be able to do that, though.