bug: floating point numbers could (attempt to) be a requested number of samples

catch it with a typecheck
factor distribution constants into their own file, in prep for sharing w/ test.speed.R
is.integer() doesn't do what you'd think it does

lol R
http://stackoverflow.com/questions/3476782/how-to-check-if-the-number-is-integer
speed test harness, first foray
Plot runtimes!

This makes the runtime harness functional :)
Timed the naive algorithms against the snappy algorithms overnight; saved the plot.
repair indentation in snappy1
link the source of the reference C implementation just to save half a second googling it
stub out Rcpp2
just a few of my tests for practice, not directly related to the project. there so you can see if you want.
Merge https://github.com/kousu/stat440