XSL: Support links to glossary entries whose <glossterm>s contain onl…

…y text.

Previously, a link of the form <glossterm linkend="id"/> where glossdef[@xml:id="id"]/glossterm contained only text nodes, rendered empty because <xsl:apply-templates> was being used to extract the contents of the glossdef/glossterm. This commit changes the XSLT to use <xsl:value-of>, instead. This works for the original case, but has the obvious and unfortunate side effect of stripping out children from all glossdef/glossterm elements. When I learn how to fix this properly, I will.

xsl/link.xsl

@@ -167,7 +167,7 @@
 	  </xsl:message>
 	</xsl:if>
 
-	<a class="glossterm" href="{$href}"><xsl:apply-templates select="$anchor/d:glossterm/*"/></a>	
+	<a class="glossterm" href="{$href}"><xsl:value-of select="$anchor/d:glossterm"/></a>	
       </xsl:otherwise>
     </xsl:choose>
   </xsl:template>