* Defined wrapper function on top of LKJCholeskyCov class

* Added possibility of changing stds and rho names

* Reorganized docs for LKJCholeskyCov

* Updated examples for MvNormal

* Integrated Adrian's comments

* Added release note

* Replaced name_stds and name_rho args by postfix

* Modified docstring accordingly

* Started updated LKJ notebook

* Finished updating LKJ NB

* Finished updating Radon example NB

* Ran Black on NBs