Configuration: simplified commented namelist settings at the end of a group by adding a special variable '.end'

Also removed description of old, namelist file level .remove facility

Namelist groups may be disabled by setting the special variable '.hide' to 'true'. This allows to selectively re-enable groups in higher order config files by setting '.hide' to 'false'

Configuration: changed handling of remove lists to not remove the .remove entries from config; used to break handling of remove lists in standalone calls to format_namelist

Global: re-added PDF version of documentation - disabled automatic update of doc version (amendment to a0efb129)

Global/Templates: changed version info to be retrieved from version control system; changed 'mkexp_input' variable to show package version

mkexp: changed 'get_file' function to return unknown variable references unchanged, added 'get_dir' function, returning the path for a given 'files' section

mkexp: changed 'list' filter replacement to map the empty string to an empty list. Added option to keep empty string as singleton list if needed