Rename mvn.Rand -> mvn.rnd
Add tests for passing Cholesky options
Add Cholesky support for mvn.rnd
Replace inverse by gesv

More stable numerically
Add cholesky option for mvn.pdf and mvn.logpdf
Merge pull request #5 from jucor/cholesky

Pass Cholesky to multivariate gaussian
Remove dofile() in test

Duh, I should probably add a pre-push hook to check for this.
Document passing the Cholesky to mvn
Merge branch 'master' into gh-pages