If you use Eclipse IDE 3.3 or later, the easiest way to download Lightwolf library is through the update site:
Choose the Lightwolf Plug-in , since it contains the Library. This plug-in comes with an Eclipse builder that enhances .class files automatically. Just add Lightwolf nature to a Java project using the project's context menu. This will also add the Lightwolf Library to the project's build path.
Sorry, not yet available. There is work in progress to create a binary distribution which includes the library and its dependencies.