Jsonargparse

--------------------

Added
^^^^^
- Inner config file support for subclass type hints in signatures and CLI (`57
<https://github.com/omni-us/jsonargparse/issues/57>`__).
- Forward fail_untyped setting to nested subclass type hints.

Fixed
^^^^^
- With fail_untyped=True use type from default value instead of Any.
- Registered types and typing types incorrectly considered subclass types.

Changed
^^^^^^^
- Better structure of type hint error messages to ease understanding.

--------------------

Fixed
^^^^^
- ``--print_config`` can now be given before other arguments without value.
- Fixed conversion of flat namespace to dict when there is a nested empty namespace.
- Fixed issue with get_defaults with default config file and parse_as_dict=False.
- Fixed bug in save which failed when there was an int key.

Changed
^^^^^^^
- ``--print_config`` now only receives a value with ``=`` syntax.
- ``add_{class,method,function,dataclass}_arguments`` now return a list of
added arguments.

--------------------

Added
^^^^^
- Path support for fsspec file systems using the 's' mode flag.
- set_config_read_mode function that can enable fsspec for config reading.
- Option for print_config and dump with help as yaml comments.

Changed
^^^^^^^
- print_config only added to parsers when ActionConfigFile is added.

Deprecated
^^^^^^^^^^
- set_url_support functionality now should be done with set_config_read_mode.

--------------------

Fixed
^^^^^
- Link argument arrow ``<=`` can be confused as less or equal, changed to
``<--``.

--------------------

Fixed
^^^^^
- add_dataclass_arguments not making parameters without default as required (`54
<https://github.com/omni-us/jsonargparse/issues/54>`__).
- Removed from signature add methods required option included by mistake.

--------------------

Added
^^^^^
- CLI now has ``--config`` options at subcommand and subsubcommand levels.
- CLI now adds subcommands with help string taken from docstrings.
- print_config at subcommand level for global config with implicit subcommands.
- New Path_drw predefined type.
- Type hint arguments now support ``nargs='?'``.
- Signature methods can now skip arguments within init_args of subclasses.

Changed
^^^^^^^
- Removed skip_check from ActionPathList which was never implemented.

Deprecated
^^^^^^^^^^
- ActionPath should no longer be used, instead paths are given as type.

Fixed
^^^^^
- Actions not being applied for subsubcommand values.
- handle_subcommands not correctly inferring subsubcommand.