stub out prereqs for dNIW, and reindent rNIW.typecheck
code guide
repair `mathematics.tex` on "chol"
Rcpp2 comment clarity
Merge branch 'master' of https://github.com/Daniel306/stat440
repair the arcane runtime snapshot.

(latex demands included graphics NOT have file extensions; that's probably why you found it confusing and commented it out in frustration)
add two new helper functions, and factor the (general) helpers into util.R
cummean()
oops, intseq() edge case

You can't request more indecies than exist in the first place
HAHAH I forgot to actually write the call that made intseq operate.
omg apparently i broke NIW when i factored it earlier; durrrrrp. I didn't run the rests! I shoulda run the tests.
Start to use apply() magic to simplify the moment code
dNIW API change: support vectorized probability densities (like every other d* function in R)
[UNTESTED] Use more apply() magic and the previous to plot first and second moments generically.
use the new moment code
remove the moment code which is now ported
code cleanup + remove the annoying space in the moment titles
coherence: tweak the names of the test functions and reenliven the NIW.moment functions into test.correctness instead of test.correctness.main
Merge https://github.com/kousu/stat440
Not sure what the change in NIW.cpp is atm.
Added a Multivariable Regression R script. Not 100% sure it's right and I wasn't sure whether to make it sample, and return, or plot/do a curve.