Support #[borrowme(std)] container attribute

[jvdwrf]

First of all I would like to thank you for such an amazing crate!
It's really something that is missing from rust, and this fills the gap perfectly.

Now to my issue: I have a bunch of custom fields, that all have the #[borrowme(std)] attribute on it.
It would be great if I could add this attribute on the container, to make it the default borrowing method for all fields.

i.e. something like this:

#[borrowme]
#[borrowme(std)]
struct Struct<'a> {
    field1: &'a CustomWrapper1,
    field2: &'a CustomWrapper2,
}

This would forward #[borrowme(std)] to all fields.

[udoprog]

That's a great suggestion!

[udoprog]

I've added support for this in #6 and it's part of 0.0.15. Thank you for the suggestion!

[jvdwrf]

Wow, that's fast! Thanks :)