Two improvements to the evidence calculation
Two improvements to the evidence calculation

1) Fix error in which thermodynamic integration was not given fburnin
which determines the burnin period. Previously it was fixed at the
default 0.1
2) If inf's exist in the mean_lnlikes the code will now recalculate the
result discarding these, but providing a warning message.

ga7g08/BayesBimodalTest