Why is the code released under two licenses – LGPL and Apache 2?
I originally considered solely a GPL version of the library but this was too restrictive, hence the LGPL version. LGPL also allows the user, at their choice, to license the software under the GPL (See LGPL Term 3) in which case this software can also be used with all the other GPLed code — see next answer. As an alternative, the entire library can be used under the terms of the Apache License, Version 2.0 which allows you use the library in most situations.