To-do list for PCF-utils, Wed Feb 21 10:39:25 EST 2007, gibson
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  Consolidate GMRES and Newton algorithms in functions or classes.
  Revise getargs stuff to take help strings and short/long flags (-o --odir)
  Implement hookstep.
  Search for good guesses.
  Periodic orbit search.

Related Channelflow to-do.

  Revise RealBasis to work with sin/cos symbolically rather than BasisFuncs.
  Add symmetry functionality to BasisFunc, RealProfile, FlowField.
    e.g. apply symmetric operators, symmetrize obejects, produce Basis w symm.