Extend friendships to allow user parameter

[pssguy]

I would find this useful

friendships(user,screen_names = character(), user_ids = character(), ...)

so could look at other people's relationships not just own

[geoffjentry]

This isn't supported by the API as far as I know, I believe it only allows for these connections from the authenticating user.

I suspect you could emulate this using the followers/following functions on an arbitrary user. I'll leave this issue open as it's possible I'll put that in at some point but it's unlikely I'll have time any time soon. I'd be happy to look at a pull request if you (or anyone reading this) was interested in making it happen.