code: function(keyOrDict, value) {
      for(var i=0; i<this.length; i++) this.set(keyOrDict, value, this[i]);
      return this;
    }
docs: SpahQL#setAll(key, value) -> SpahQL
  - key (String, Number): The key to set on this result
  - value: The value to set for the given key
  SpahQL#setAll(dictionary) -> SpahQL
  - dictionary (Object): A key/value hash containing multiple keys to be set.
  
  Just like #set, only it attempts to set the given key(s) on all items in this set:
  
  db.select("//foo").set("a", "a-value") // Attempt to set "a" on all "foo" objects
  
  Just like #set, returns self.