bayesAB 1.1.0

Breaking

• Changed conjugate prior of Normal/LogNormal distributions to be the NormalInverseGamma distribution from a combination of the Normal and Inverse Gamma distributions. This distribution is bivariate and gives us a 2d estimate for both x and sig_sq. The params for this distribution are mu, lambda, alpha, beta and are different from the old priors that Normal/LogNormal were expecting.
  • Various doc changes to illustrate these changes and new expectations

Major Changes

• Fix closed form distributions and added tests
• Calculation Posterior Expected Loss is now correct and represents a true loss function
• Added plotNormalInvGamma

Minor Changes

• Colors for sample plots are now hardcoded (red for > 0 and blue for < 0)
• Plots are truncated at the extremes to avoid very long tails