Report Number of Censored Volumes

[jdkent]

That's great news!

As of v0.5.0, I do censor volumes, but within the context of trying to get my dissertation written, I haven't had time to tidy up/update the documentation (and there is not a good way to tell what volumes have been censored, which really needs to be implemented).

I'll bump the reporting of censored volumes higher to my todo list.

Originally posted by @jdkent in #303 (comment)

Users should (at least) know how many volumes were discarded before the correlation was calculated.