added command line utility to verify that CheckDecomposition output looks ok; could have caught previous bugs, looks ok now

added command line utility that will use CheckDecomposition from SWFFT to see which decompositions the current decomposition.c code heuristics will find working pencils for

fixed bug in enumeratePencils which kept some valid pencils from being printed; other functions correctly identified when valid pencils were present so only bug at last step of printing

moving newer FFT decomposition python code to its own package, module, namespace, whatever; will add command line wrappers and README