updated options for including svg images to fix paths used for includ…

…ing images inline (the old way) and via data uris (one of the two new options).

the paths used to read in the svg xml files needed the base "image/" parent directory.

this suppots issue #23

icons.xsl

@@ -45,11 +45,11 @@
         -->
         <xsl:choose>
           <xsl:when test="$iconReferenceStyleVariable = 'inlineLiteralXml'">
-            <xsl:copy-of select="doc(concat($baseFilename, '.svg'))" />
+            <xsl:copy-of select="doc(concat('images/', $baseFilename, '.svg'))" />
           </xsl:when>
 
           <xsl:when test="$iconReferenceStyleVariable = 'dataUri'">
-            <xsl:variable name="base64Data" select="unparsed-text(concat($baseFilename, '.svg.base64'))" />
+            <xsl:variable name="base64Data" select="unparsed-text(concat('images/', $baseFilename, '.svg.base64'))" />
             <img><xsl:attribute name="src" select="concat('data:image/svg+xml;base64,', $base64Data)" /></img>
           </xsl:when>