Cannot document derive macros with decl_derive

[Anthony Ramine]

This is probably true of the other helper macros too.

[Nika Layzell]

I think this is a dup of #21, it should be possible since #35, with the following syntax:

decl_derive! {
    [Interesting] =>
    /// Documentation Comments
    derive_interesting
}

[Anthony Ramine]

Oh sorry I put the docs over the bracketed thing. Thanks for the answer!