changed errorEstimate for rmseSMA - interpolating error rather than enso/df.wt to get a smoothed (ave'd) error trendline. Should be the same dates as used in proxyENSOcorrelation
tweaks to plots to make them more legible
switched T and P in plot to get red T, blue P
loof at using findiInterval for getting bin yrs.. need to run P for Annualgit diff!