Fixed bug in hierarchical example
Minor tweaks to plots
Started work on forestplot
Finished forestplot, added test
Fixed bug with forestplot labels; added burn-in parameter to statfunc decorator
Continued work on autocorrelation plot
Plotting histogram for discrete variables in traceplot
Merge branch 'plots' of github.com:pymc-devs/pymc into plots

Conflicts:
	pymc/plots.py