add screenshot of log4e.el
add a page about logging for Elisp
add a page about handling error on Elisp
Renamed from HandlingErrorForElisp. This is not a general page about Elisp error handling.
Renamed.  Please do not name library-specific pages as if general.
Renamed from LoggingForElisp.  This is not a general page about logging.
Renamed (DeletedPage).