New icon, including its credits and license.

--HG--
extra : amend_source : 13377e1768d0a448e88f93c648c80bdee6acfc9d
Added tag 1.2 for changeset 52522cb0a61d
Relocate icon.

--HG--
rename : static/src/img/icon.png => static/description/icon.png
Added tag 2.0 for changeset 86bbfebf180a