added summary plot for trace
history -> trace
ARM example errors
examples now found recursively
import plot
removed extraneous file
history -> trace everywhere
now distributions are classes
more hist -> trace changes
merged
fixed dist error
changed name in sample
fixed up model not to take a starting point
added dirichlet
added multigammaln and multipsi functions for Wishart distribution
changed name of bent
split out continuous, discrete and multivariate distributions
added more docs to multivariates
refactored multigammaln function
fixed multigammaln