Add Bernoulli distribution

[Neverstop7]

Hi all!
First of all thank you for creating the changepoint R package!
I think it would be useful to analyse changepoints in binary data. Is it possibile to support Bernoulli distribution?
Since both the mean and the variance of a bernoulli distribution depend on the probability of success p, I would say that this distribution will only be available for the cpt.meanvar() function.
Thank you!

y = c(rbinom(50,size=1,prob=0.2),rbinom(50,size=1,prob=0.8))

[rkillick]

The Bernoulli distribution is available inside the binary branch. It is still undergoing testing and then will be merged in a future release.