Copyright assignment for ivy-posframe

[Ramsay Leung]

Hi forks, there is a proposal to move `ivy-posframe`, an Emacs package to Elpa, check this Github issue for more details: https://github.com/tumashu/ivy-posframe/issues/95

I have contributed to `ivy-posframe` with more than 15 lines of code, so I think I need to sign a copyright paper as what @Ergus suggests, but I have never signed a GPL paper before, so I don't know how to start it.

After reading this manual: https://www.gnu.org/software/emacs/manual/html_node/emacs/Copyright-Assignment.html#Copyright-Assignment

It seems what I need to do is just send a mail to GNU maillist, thus I do so.

Sincerely

Ramsay Leung.