Created unsafeUpdate, unsafeValueAt for DenseVector. These can significantly improve performance, though of course you need to manually do bounds checks. I.e., unsafeValueAt(-1) will fail.
Beta distribution is broken at the endpoints. Now fixed.
remove unnecessary import
Beta.pdf now acts as a ufunc.
needed import
Merge pull request #168 from stucchio/distributions_ufunc

Distributions as UFunc
Merge pull request #166 from stucchio/unsafeFunctions

Created unsafeUpdate, unsafeValueAt for DenseVector.