* Added wrapper to use PYTHON environment variable in tests
* Added unicode comment to default test config
* Changed config objects to use locale encoding
* Changed to use byte buffers for config (re-)writing
* Added tests for unicode sensitive tools

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)