Updated the JRO docstring and file header comments.

Removed the old Madrigal template, which was actually a broken implementation of a general instrument.

Updated the JRO ISR download docstring, removing the unnecessary "+" formatting suggestion.

Added a function to specify Madrigal instrument codes, grouping them by pandas-compatible or xarray-compatible.

Updated the general unit tests by:
- adding a new unit test for the new known Madrigal instrument code function, and
- updated tests for `_check_madrigal_params` to capture new, better evaluation.

Added a general instrument sub-module for time-series Madrigal data.

Updated the instrument init by:
- breaking out the imports to different lines and
- adding the new instrument.

Updated the changelog with a summary of the enhancements so far.

Added a function to return the known madrigal file formats and test these formats for pysat parsing compatibility.  Also updated docstrings and local comments.

Updated the GNSS TEC, JRO ISR, and pandas general instruments to use the new general file format function.  Also updated the pandas general list methods to handle kindat and year formatting.  Improved the pandas general instrument by only including Madrigal instrument codes with parsable file formats and adding download test support for one of the possible instruments.

Added unit tests for `known_madrigal_inst_codes` and updated the version evaluations to use the packaging module.

Added the packaging module as a dependency.  It was already required by other modules, so is not adding additional overhead.

Added a description of the general pandas instrument to the docs.

Updated the changelog to include the new improvements and cycled the year for the next release.

Fixed test method names that weren't updated when copying from an older test.

Updated the general madrigal instrument example.

Updated the test day to be different, and hopefully work.

Added a verbosity flag to the general Madrigal file format function, implemented this flag in the instruments that use the function, and added unit tests for it's success.

Set the general pandas instrument download tests to True for all tags.

Expanded ranges of values that indicate all kindat options should be considered.

Allows Madrigal to store HDF5 files using either the 'h5' or 'hdf5' extensions.  Also changed the date for the testing to comply with the file available for tag 7800.

Use presence of '*' to choose the correct file parsing method.

Updated test dates for current known potential instruments.

Fixed the logic for evaluating the presence or absence of a wildcard.

Examine file format to provide delimiter, if needed.

Add a pysat version cap for this pull request.

Removed try/except catch that is now handled in the general list_remote_files function.

Bumped the lowest supported pysat version due to an xarray issue.

Removed the Van Allen probe data because the file handling requires additional support.