Require Cairo package.
Initial implementation of a predict function.
Improve robustness of Chains header formatting.
Check that prediction is for a Stochastic node.
Include user add-on packages and functions.
Remove deprecated functions.
Upgrade to latest Distributions package.
Remove Truncated rand method now located in Distributions package.
Add arguments needed for latest Truncated constructor.
Standardize on the current multivariate Normal and T Distributions.
Update documentation version to 0.4.0.