* contrib/odt/styles/OrgOdtAutomaticStyles.xml: Removed
* contrib/odt/styles/OrgOdtContentTemplate.xml: Added. This
file is now a fully-formed "content.xml" file but with "empty"
content. Note that the original "OrgOdtAutomaticStyles.xml"
was just an xml fragment.
* contrib/lisp/org-odt.el
(org-odt-document-content-header): Removed.
(org-export-odt-automatic-styles-file): Removed.
(org-export-odt-content-template-file): Renamed from
`org-export-odt-automatic-styles-file'.
(org-odt-data-dir): Update docstring.
(org-odt-begin-office-body, org-odt-begin-document-content):
Modified to accomodate changes introduced by the new
"OrgOdtContentTemplate.xml" file.