* Better logging; Unknown field dimension; Reconstruct field
* Better logging; Unknown field dimension; Reconstruct field

  Guess at an array size if one dimension is unnkown. That is, if a single
  dimension has size -1.

  Use a logger rather than print statements.

  If a grid changes sizes, reconstruct the field to be printed, construct
  a new output file name, create the file and from now on append to that
  file.


csdms/pymt,csdms/coupling,csdms/coupling