librarian update, settings update, other fixes

Updated librarian to adhere more strictly to SCP and SVCP file
hierarchies so that chapter names and volume names are tied to the first
folder encountered after the volume or series folder respectively,  sub
folder content is compiled into the so called 'super chapter' folder.
added an error console to the settings tab so page error messages can be
viewed without the need for a debug console open.  Other minor fixes.