Add parameter for manual insertion of preambel

tei2eoatex.xsl

@@ -11,6 +11,7 @@
   <xsl:param name="contributors" as="xs:boolean" required="no" select="false()"/>
   <xsl:param name="strictfloats" as="xs:boolean" required="no" select="false()"/>
   <xsl:param name="indentfloats" as="xs:boolean" required="no" select="false()"/>
+  <xsl:param name="manualpreambel" as="xs:boolean" required="no" select="false()"/>
   <xsl:param name="verbosity" as="xs:integer" required="no" select="0"/>
   <xsl:param name="parts" as="xs:boolean" required="yes"/>
 
@@ -84,7 +85,14 @@ contexts, a double replacement is performed.
     <xsl:value-of select="eoa:texcomment(concat('LaTeX output, generated by script tei2eoatex.xsl on ', current-dateTime()))" />
     <xsl:value-of select="eoa:texcomment(concat('Using ', system-property('xsl:product-name'), system-property('xsl:product-version'), ' by ', system-property('xsl:vendor'), ' (', system-property('xsl:vendor-url'), ')'))" />
     <xsl:text>&#x000a;</xsl:text>
-    <xsl:text>\input{preambel/pre_eoa}&#x000a;</xsl:text>
+    <xsl:choose>
+      <xsl:when test="$manualpreambel">
+        <xsl:text>\input{preambel/pre_eoa}&#x000a;</xsl:text>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:value-of select="eoa:texcomment('Preambel is to be attached by eoatex2pdf script')"/>
+      </xsl:otherwise>
+    </xsl:choose>
     <xsl:text>\EOAbibliographytype{</xsl:text>
     <xsl:value-of select="//tei:sourceDesc/tei:ab[@type='bibdatabase']/tei:ref/@type"/>
     <xsl:text>}&#x000a;</xsl:text>