i can accept your contribution in one of three ways:
a) you can assign me copyright to your work and i will grant you attribution,
b) you can release your work into the public domain and i will grant you attribution (generally isomorphic to ''a'' above),
c) you can release your work to the public under a license of your choice (preferably CC-BY or CC-BY-SA) and i will comply with the terms of that license

any thoughts?