LDEV-75 Implemented a Flash client crash dump utility. Writes out the wddx packet from Flash to a file in the LAMS dump directory. The DumpDirectory is configured via DumpDir in the LAMS configuration file. Moved the WDDX null entry checking to the base packet handling servlet (AbstractStoreWDDXPacketServlet) so that all packets will be checked, not just authoring packets.
LDEV-79: Added a new DISABLED state for a lesson - when disabled the lesson shouldn't be returned to users. Changed getLessonsForUser() to not return DISABLED lessons, but left getAllLessons() getting all (including disabled) lessons. But added a comment to indicate that getAllLessons includes disabled lessons.