Fix resetting article object properties.
Write XML function for testing.
Contrib id: add author- prefix.
Basic addition of ethics data. Note: data columns with value of 0 do not get added.
Author conflicts as back matter Competing interest.
Merge pull request #70 from gnott/tweaks

Tweaks
Merge pull request #71 from gnott/xls-backmatter

Xls backmatter
set names of output files to match requriemnts
added git ref in comment in generated xml
added commit from last git commit and date generated into comment in XML
Merge pull request #72 from IanMulvany/write-files

Write files