code: def endnotemap(self, cache=True):
          
          if self.__endnotemap is not None and cache==True:
              return self.__endnotemap
          else:
              x = self.xml(src='word/endnotes.xml')
              d = Dict()
              if x is None: return d
              for endnote in x.root.xpath("w:endnote", namespaces=self.NS):
                  id = endnote.get("{%(w)s}id" % self.NS)
                  typ = endnote.get("{%(w)s}type" % self.NS)
                  d[id] = Dict(id=id, type=typ, elem=endnote)
              if cache==True: self.__endnotemap = d
              return d
docs: return the endnotes from the docx, keyed to string id.