regime.plot: Adds visualization of regimes to a plot
In bayou: Bayesian Fitting of Ornstein-Uhlenbeck Models to Phylogenies

Adds visualization of regimes to a plot

1	regime.plot(pars, tree, cols, type = "rect", transparency = 100)

`pars`	A bayou formatted parameter list
`tree`	A tree of class 'phylo'
`cols`	A vector of colors to give to regimes, in the same order as pars$sb
`type`	Either "rect", "density" or "lines". "rect" plots a rectangle for the 95% CI for the stationary distribution of a regime. "density" varies the transparency of the rectangles according to the probability density from the stationary distribution. "lines" plots lines for the mean and 95% CI's without filling them.
`transparency`	The alpha transparency value for the maximum density, max value is 255.