suse-xsl 2.0.1

• Schema
  • Enabled subtitle and textobject (susedoc5.rnc)
• Stylesheets
  • Changed bugzilla component to 'Documentation' for SLERT
    (suse2013/static/js/script.js)
  • Added missing subtitle for articles
    suse2013/fo/article.titlepage.templates.xsl
• Infrastructure
  • Trying to fix an undef value error (bin/xslns-build)
  • Fixed bin/xslns-build for building ns variant