Question: is wrapped distribution a meanful extension in Edward?

[rencx]

I'm a newbie in probabilistic graph models. In my work, I have met several problems in evaluating distributions for angles ( in navigation, geographical information systems, etc) or combining wrapped distribution with common distributions such as Gaussian distribution. Wrapped distribution, especially von Mises distribution, is powerful in modelling relevant phenomena.

Currently I do not find support of above distributions in Edward. What can I do to make this a feature in Edward?