plot_components.py now uses agg backend
added script to subsample NCAR/NCEP reanalysis in space
added capability of automatically determining NUM_EIGVALS from data as the length of the time series
added new function to load subsamples slp data
added script to compute matching between components in space or in time and display the result
to ensure unmatched pairs from the Kuhn-Munkres algorithms are apparent, these are marked by -1
added optional parameter that centers the Robinson projection to Europe or to the Pacific