org-odt.el: By default, include page numbers in the page footer

* OrgOdtStyles.xml (OrgTitlePage): New page style.  Include no
footer.  Use "OrgFrontMatterPage" for the following page.
(OrgFrontMatterPage): New page style.  Include a footer that
displays page numbers in Roman style.  Use mirrored pages.
Use "OrgFrontMatterPage" for the following page.
(OrgPage): New page style.  Include a footer that displays
page numbers.  Use mirrored pages.  Use "OrgPage" for the
following page.
(OrgFirstPage): New page style.  Include a footer that
displays page numbers.  Right page only.  Use "OrgPage" for
the following page.
(Standard): Modify to include a footer that displays page
numbers.  Use mirrored pages.  Use "Standard" for the
following page.

None of the above page styles have a header.

The newly added page styles are not used as yet.

etc/styles/OrgOdtStyles.xml

@@ -718,15 +718,75 @@
   <text:linenumbering-configuration text:number-lines="false" text:offset="0.499cm" style:num-format="1" text:number-position="left" text:increment="5"/>
  </office:styles>
  <office:automatic-styles>
-  <style:page-layout style:name="Mpm1">
+  <style:style style:name="MP1" style:family="paragraph" style:parent-style-name="Footer">
+   <style:paragraph-properties fo:text-align="center" style:justify-single-word="false"/>
+  </style:style>
+  <style:page-layout style:name="Mpm1" style:page-usage="mirrored">
    <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm">
-    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="none" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style>
+    <style:header-footer-properties fo:min-height="0.6cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0.499cm" style:dynamic-spacing="false"/>
+   </style:footer-style>
+  </style:page-layout>
+  <style:page-layout style:name="Mpm2">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
    </style:page-layout-properties>
    <style:header-style/>
    <style:footer-style/>
   </style:page-layout>
+  <style:page-layout style:name="Mpm3" style:page-usage="mirrored">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="i" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style>
+    <style:header-footer-properties fo:min-height="0cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0.499cm"/>
+   </style:footer-style>
+  </style:page-layout>
+  <style:page-layout style:name="Mpm4" style:page-usage="right">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" fo:background-color="transparent" style:writing-mode="lr-tb" style:footnote-max-height="0cm">
+    <style:background-image/>
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style>
+    <style:header-footer-properties fo:min-height="0.6cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0.499cm" style:dynamic-spacing="false"/>
+   </style:footer-style>
+  </style:page-layout>
+  <style:page-layout style:name="Mpm5" style:page-usage="mirrored">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style>
+    <style:header-footer-properties fo:min-height="0.6cm" fo:margin-left="0cm" fo:margin-right="0cm" fo:margin-top="0.499cm" style:dynamic-spacing="false"/>
+   </style:footer-style>
+  </style:page-layout>
  </office:automatic-styles>
  <office:master-styles>
-  <style:master-page style:name="Standard" style:page-layout-name="Mpm1"/>
+  <style:master-page style:name="Standard" style:page-layout-name="Mpm1">
+   <style:footer>
+    <text:p text:style-name="MP1"><text:page-number text:select-page="current"></text:page-number></text:p>
+   </style:footer>
+  </style:master-page>
+  <style:master-page style:name="OrgTitlePage" style:page-layout-name="Mpm2" style:next-style-name="OrgFrontMatterPage"/>
+  <style:master-page style:name="OrgFrontMatterPage" style:page-layout-name="Mpm3">
+   <style:footer>
+    <text:p text:style-name="MP1"><text:page-number text:select-page="current"/></text:p>
+   </style:footer>
+  </style:master-page>
+  <style:master-page style:name="OrgFirstPage" style:page-layout-name="Mpm4" style:next-style-name="OrgPage">
+   <style:footer>
+    <text:p text:style-name="MP1"><text:page-number text:select-page="current"/></text:p>
+   </style:footer>
+  </style:master-page>
+  <style:master-page style:name="OrgPage" style:page-layout-name="Mpm5">
+   <style:footer>
+    <text:p text:style-name="MP1"><text:page-number text:select-page="current"/></text:p>
+   </style:footer>
+  </style:master-page>
  </office:master-styles>
 </office:document-styles>