Add transform argument to link and invlink methods.
Use vec function in place of [:] notation for readability.
Return MultiVariate names as an array of same dimension.
Add nlink field to Dependent types.
Apply link function when extracting model node names and values.
Fix setinits! to set monitor field after distr field.
Add PDMatDistribution type and methods link, invlink, and logpdf.
Document nlink fields in Dependent types.
Document changes to the link and invlink methods.