Add improvements per review-input
Add improvements per review-input

- Rename configure_and_match_pattern()
  to configure_metadata_patterns()
- Improve and correct the argument and return values
  on read_header_line() and configure_metadata_patterns().
- Remove extranious logger.warning for match output.
- Additional documentation detail.

kwinkunks/lasio,kinverarity1/las-reader,kinverarity1/lasio