go-marc21

Currently does:

• Read MARC21 and MARCXML data.

• Convert between MARC21 and MARCXML data.

• Write "Pretty-print" text (compatible with perl MARC::Record->as_formatted() output)

Things that would be nice TODO:

• Convert MARC-8 encoding to UTF-8

• Perform error checking on MARC records

• Read/write MARCMaker files https://www.loc.gov/marc/makrbrkr.html