Renamed sim_* functions to simdata_*
Updated simdata_normal to generate generic multivariate normal populations rather than a specific configuration.
Made uniform the code for constructing intraclass and autocorrelation covariance matrices.
Cleaned up some code and documentation for simdata_normal.
Updated simdata_t to generate generic multivariate Student's t populations rather than a specific configuration.
Fixed an issue in examples for normal and t simdata.
Added unit tests for simdata_normal
Oops. Forgot to set RNG seed in simdata-t
Added unit tests for simdata_t
Added simdata_contaminated to generate multivariate contaminated normal random variates.
Added unit tests for simdata_contaminated
Added simdata_guo to generate multivariate normal random variates with the block-diagonal covariance structure from Guo et al. (2007).
Added unit tests for simdata_guo. Fixed some code to help tests pass.
Removed Duin sims.
Added simdata_friedman to generate multivariate normal from six experiments from Friedman (1989). Also, added unit tests for each sim experiment.
Updated simdata wrapper with a better description and up-to-date data-generating functions.