Docbook reorg

These are the changes; mostly deleted the small *.zpts files and added one master docbook.zpts file. However other small changes were made outside the DocBook renderer.

   * Floats.py
           - made changes to table and figure
   * Sentences.py
            - added textsubscript and textsuperscript
   * TeX/Text.py
            - add uppercase command
   * Packages
            - added jss.py for Journal of Statistical Software class: mainly stub classes
   * Renderers/__init__
            - added templateName logic in the '__unicode__' method