This reverts commit 5e9ef6e9.

* Added full access to all other job configs for every job
* Added overriding of global variables in jobs
* Added job settings to global variable list (same as 'JOB' section)
* Changed upcoming release from 1.1.2 to 1.2.0, using 1.2.0dev for now

* 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'

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

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

mkexp: reading of EXP_DESCRIPTION from initial comment now also discards leading and trailing lines that only contain white space and comment characters

Disabled evaluation of standard Jinja blocks ({% ... %}) and comments ({# ... #}). This allows handling templates with standard Jinja code and shell scripts using array length expansion (${#ARRAY})

* First look for templates based on the config file's base name
* Then look for templates based on the given EXP_ID

Added SETUP_OPTIONS support for push model configuration requirements into the option list (e.g. no_hamocc, if HAMOCC is disabled at build time)

* Changed handling of '.use_template' to allow use of arbitrary template names
* Fixed error message for missing or wrong options
* Fixed setting ENVIRONMENT to 'DEFAULT' if set to empty in SETUP.config (see IssueID #5808)
* Added 'match' filter, allowing to use regular expression matches
* Added missing tests for 'wordwrap' filter
* Re-wrote documentation on additional Jinja filters

* Added 'raw(...)' expression to allow unquoted namelist expressions
* Added 'set' test to reliably check if namelist switches are true
* Updated version info and change list

* Added function add_days to handle day offsets for namelist settings

* Changed split_date to also handle YYYYMMDD dates
* Added function add_years to handle year offsets for namelist settings