Change default HTML format to sphinxdoc
Add list of keywords modified by patch_headers to docs
Change to script and add significant documentation
Move argument parsing setup to separate module for use across scripts.
Add crude sphinx page for scripts
Make run_astrometry a proper script and document
Change name of and add documentation to directory argument
Edit documentation to reduce repetition

In particular, discussion of command line options has been removed from the module doctoring because it is auto generated by argparse.
Document functions that carry out the processing.
Add Sphinx argparse extension
Move construction of default parser to script_helpers
Remove debugging print statements
Remove instance of setting a default parameter value to []
Add several command line options and documentation
Allow for directories argument to be optional
Add RA to list of keywords only if it is not already present
Correct documentation to indicate it also adds object info
Convert to script and add documentation
Incorporate script documentation
Change name of package displayed in documentation