The 'frontend' subproject probably needs to be licensed under only the GNU General Public License, due to a "direct" python dependency on the GPL'd wotsap library. We are planning to modify wotsap to run as a daemon/service for processing speed reasons, in which case 'frontend' will not have to be GPL'd and the wotsap service will be.
The licenses are alternatives and if you select one license, that one alone applies. If you choose Apache 2.0, you should be able to link with nearly anything. There is current debate if the (L)GPL2 is compatible with Apache 2.0 (FSF says no, ASF says yes) so when linking with LGPL or GPL'd code it makes sense to pick either of the LGPL or GPL licenses. (Some ideas and text from Redland)
Each source file should have a header like this:
# Copyright (C) 2005-2005 Dave Brondsema, Andrew Schamp # This package is part of Konfidi http://konfidi.org/ # It is licensed under two alternative licenses (your choice): # 1. Apache License, Version 2.0 # 2. GNU Lesser General Public License, Version 2.1 # # # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # # # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library 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 # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA