added AGPL3 license

licenses/AGPL3.erb

@@ -0,0 +1,17 @@
+<%=copyright_software%> - <%=copyright_software_description%>
+Copyright (C) <%=copyright_years.join(', ')%> <%=copyright_holders.join(', ')%>
+
+This file is part of <%=copyright_software%>.
+
+<%=copyright_software%> is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+<%=copyright_software%> is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with <%=copyright_software%>.  If not, see <http://www.gnu.org/licenses/>.