3.00  Added option for exponential fit.
2.90  Removed "with" to be compatible with newer gnuplot versions.
2.80  Added stderr of mean.
2.70  Fixed bug in c.95, where exactly 30 samples caused NAN.  
      Made main() return 'int'.
2.64  Fixed email address.  Fixed sst bug that printed ssr.
2.63  Lines preceeded by '#' are treated as a comment.
2.62  Fixed floating exception error that happens when line count = 1
2.61  Added batch mode for variance of individual from grouped samples
2.60  Prints verbose info to display even if only one column.
2.59  Fixed so that invalid lines do not increase line count.
2.58  Modified the verbose output.
2.57  Fixed the correlation computation.
2.56  Variance is (x - mean_x)^2 / (n - 1) instead of / (n).
2.55  -gp or -GP with no confidence will give line fit but not 
      min and max lines.
2.50  Added two types of confidence intervals for lines: the intervals
      for a single observation and the intervals for many observations.
2.00  Added linear regression capabilities.
1.00  Initial version.  Did summary statistics on one-fielded inputs.