Commit before getting back to it.
Metropolis hastings algorithm to do inference.
Some diagnostic plots for mcmc
Better metropolis hastings - abstraction across the mh functions
for each component.
Now using block proposals for signals
Optimized binomial pmfs since that was major bottleneck.
Added docstrings
Multiple chains.
Fixed big bug - log acceptance ratio, rather than acceptance ratio
Proposals depend on previous state - trying truncnorm rather than beta