change fit_mle to fit for Cauchy (the current implementation is not MLE)
Enhanced estimation interface for Categorical
More functions for estimating Categorical
Enhanced interface for Binomial estimation
add @inbounds for Gamma estimation
minor rearrangement of Dirichlet estimation code
@inbounds for Dirichlet estimation
add Estimator type and interface

This is a nonintrusive modification. By delegating estimate(e::MLEstimator, x) to fit_mle, we no longer need to make any change to original codes.
include estimators.jl
Implement posterior_mode and fit_map for a series of distributions.
Change parameterization of InverseGamma (using the wikipedia way)
Fix Normal characteristic and moment generating functions
Merge pull request #141 from simonster/cf

Fix Normal characteristic and moment generating functions
Conjugate normal distributions for random mean and (co)variance.  Also added
`posterior_sample` to update an observation model from a posterior sample.
Merge pull request #140 from nfoti/ninvgamm-niw

Conjugate normal distributions for random mean and (co)variance and posterior updating.
Add regularized incomplete beta and gamma functions. Use them and their auxiliary functions as much possible.
merge in anj's gamma and beta functions