Review implementation of BusinessTemplateArchive
Julien Muchembled authored
- fix export to tarball
- new API will allow to export files directly to the working copy without
  using any temporary folder

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43617 20353a03-c40f-0410-a6d1-a30d3c3de9de
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