s/mj@artefactual.com/mj@suhonos.ca
Added ability to set purge defaults with CLI options.
Update one more @author phpdoc tag
Uncomment get_component, fixes #552
Merge branch issue-4320 of jraddaoui fork

His commits has been squahed in this commit. This is his first
contribution in the project! It fixes #4320.
Cosmetic changes
Fixed issue with EAD import of creators.
Added flag to purge task to enable reading username/email from Git configuration.
Fixed EAD issue with creator history not roundtripping.
fixed #4424 (Source language not exporting properly via EAD).
fixed #4427 - EAD exporting date elements even if no date exists.
Roughed in EAD import/export for drafting status.
fixed #4429 drafting status not roundtripping in EAD.
Use function parameters
fixes #4433 description identifier not roundtripping in EAD
fixes #4428 institution identifier not roundtripping in EAD
fixed #4431 language of description not roundtripping in EAD
fixed #4434 bad indentation in EAD templates
fixed #4430 level of detail not roundripping in EAD import/export
Made a number of tweaks to EAD imort/export to make it conform better to the DTD.