Add main.xcd of libreoffice defaults.
Format libreoffice main.xcd to a nicer layout (there should not
be any functional change).  The magic incantation is
"cat main.xcd | xmllint --format -".
Change the default of UpdateReferenceOnSort back to what it
was previously.  See
https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1389858.
Add puppet rules to put UpdateReferenceOnSort main.xcd to effect.
Merge branch 'libreoffice_update_reference_on_sort'

    Change the default of UpdateReferenceOnSort back to what it
    was previously.  See
    https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1389858.