TEI template: improve publicationStmt.

Add support for publisher, address, pubPlace, and date variables.

data/templates/default.tei

@@ -9,9 +9,23 @@ $for(author)$
 $endfor$
     </titleStmt>
     <publicationStmt>
+$if(publicationStmt)$
       <p>$if(publicationStmt)$$publicationStmt$$endif$</p>
+$endif$
 $if(license)$
       <availability><licence>$license$</licence></availability>
+$endif$
+$if(publisher)$
+      <publisher>$publisher$</publisher>
+$endif$
+$if(pubPlace)$
+      <pubPlace>$pubPlace$</pubPlace>
+$endif$
+$if(address)$
+      <address>$address$</address>
+$endif$
+$if(date)$
+      <date>$date$</date>
 $endif$
     </publicationStmt>
     <sourceDesc>

test/writer.tei

@@ -8,7 +8,7 @@
       <author>Anonymous</author>
     </titleStmt>
     <publicationStmt>
-      <p></p>
+      <date>July 17, 2006</date>
     </publicationStmt>
     <sourceDesc>
       <p>Produced by pandoc.</p>