docs: def addKey(self, key, value):
          '''Insert a attribute/element/key-value pair to all the dictionaries.
  
          The same value is added to all of the dictionaries.
  
          Of note: the current version of this routine cannot handle subtending
          keys (dictionaries in dictionaries).
  
          Example of use:
  
          >>> test = [
          ...    {"name": "Jim",   "age": 18, "income": 93000, "wigs": 68       },
          ...    {"name": "Larry", "age": 18,                  "wigs": [3, 2, 9]},
          ...    {"name": "Joe",   "age": 20, "income": 15000, "wigs": [1, 2, 3]},
          ...    {"name": "Jim",   "age": 29, "zim": {"zam": "99"}              },
          ...    {"name": "Bill",  "age": 19, "income": 29000                   },
          ... ]
          >>> print PLOD(test).addKey("sp", 3).returnString()
          [
              {age: 18, income: 93000, name: 'Jim'  , sp: 3, wigs:        68, zim: None         },
              {age: 18, income: None , name: 'Larry', sp: 3, wigs: [3, 2, 9], zim: None         },
              {age: 20, income: 15000, name: 'Joe'  , sp: 3, wigs: [1, 2, 3], zim: None         },
              {age: 29, income: None , name: 'Jim'  , sp: 3, wigs: None     , zim: {'zam': '99'}},
              {age: 19, income: 29000, name: 'Bill' , sp: 3, wigs: None     , zim: None         }
          ]
          
          .. versionadded:: 0.1.4
          
          :param key:
             The dictionary key (or cascading list of keys point to final key)
             that should be removed.
          :param value:
             The value assigned to the key.
          :returns: self
          '''
          result = []
          for row in self.table:
              try:
                  row[key]=value
              except:
                  pass
              result.append(row)
          self.table = result
          return self