Script: odfcontent-element
    A odfcontent element tells where the module shall search for its content.
    The template of the module must have a processing instructions (PI) of type
    importodf, see: 
ImportODF
 
    to realize the actual extraction of content.
  A Module may contain any number of ODFContent elements.
 
<odfcontent location=""/>
  
    | location(mandatory) | Any string that represents a file, either as an absolute URI or 
    as an URI relative to the active anchor. | 
  
    | backuplocation(optional) | Any string that represents a file, either as an absolute URI or 
        as an URI relative to the active anchor. 
        Is used if location for some reason
        is not availabe. It is not a backup in the sense that the primary file is stored here. 
        It is up to you to supply a meaningfull backup file. | 
   
    | id(optional) | An id that identifies this  odfcontent in 
    importodf in a template. | 
  
  
  
A odfcontent element may not  contain any elements
Examples:
<odfcontent location="${_scriptpath}/section3/myfile.odt"/>