add "issuetitle" in article head, HTML and PDF

Author: piero-g

z-lib/article.html5

@@ -67,7 +67,7 @@ $if(title)$
 <div property="isPartOf" typeof="PublicationVolume">
 <meta property="volumeNumber" content="$volume$" />
 <meta property="datePublished" content="$year$" />
-<p property="isPartOf" typeof="Periodical"><span property="name" resource="$journal.url$" content="$journal.title$">$journal.title$</span>$if(issuedisplay)$. $issuedisplay$$if(issuepagination)$, $if(page.prefix)$$page.prefix$$if(page.end)$$page.start$&nbsp;&ndash;&nbsp;$page.prefix$$page.end$$else$$page.start$$endif$$else$$if(page.end)$$page.start$&ndash;$page.end$$else$$page.start$$endif$$endif$$endif$$endif$
+<p property="isPartOf" typeof="Periodical"><span property="name" resource="$journal.url$" content="$journal.title$">$journal.title$</span>$if(issuedisplay)$. $issuedisplay$$if(issuetitle)$: $issuetitle$$endif$$if(issuepagination)$, $if(page.prefix)$$page.prefix$$if(page.end)$$page.start$&nbsp;&ndash;&nbsp;$page.prefix$$page.end$$else$$page.start$$endif$$else$$if(page.end)$$page.start$&ndash;$page.end$$else$$page.start$$endif$$endif$$endif$$endif$
 $if(journal.eissn)$<br />ISSN <span property="issn">$journal.eissn$</span>$endif$
 </p>
 </div>

z-lib/article.latex

@@ -710,8 +710,9 @@ $else$
 $-- custom: first page header and footer --$
 \fancypagestyle{plain}{%
   \fancyhf{}%
-  % right header: journal title (extended) and eISSN
-  \rhead{\small\sffamily $journal.title$$if(issuedisplay)$. $issuedisplay$$endif$$if(journal.eissn)$ \\ ISSN~$journal.eissn$$endif$$if(extrarowheader)$ \\ \url{$journal.url$}$else$$if(editor)$ \\ \url{$journal.url$}$endif$$endif$}
+  % right header: journal title (extended) and eISSN (up to 4 rows: 1. journal.title+issuedisplay + 2. [opt] issuetitle + 3. issn + 4. [opt] journal.url)
+  % TODO: align with HTML (add pagination)
+  \rhead{\small\sffamily $journal.title$$if(issuedisplay)$. $issuedisplay$$if(issuetitle)$ \\ $issuetitle$$endif$$endif$$if(journal.eissn)$ \\ ISSN~$journal.eissn$$endif$$if(extrarowheader)$ \\ \url{$journal.url$}$elseif(editor)$ \\ \url{$journal.url$}$endif$}
   % left header: section, peer-reviewed plus DOI or journal url
   $if(article.section)$
   \lhead{\small\sffamily $article.section$$if(article.peer-review)$ -- \emph{$localization.peer-reviewed$}$endif$