Add a few basic rugplot tests
Add a few basic rugplot tests

anntzer/seaborn,phobson/seaborn,sauliusl/seaborn,lukauskas/seaborn,anntzer/seaborn,arokem/seaborn,lukauskas/seaborn,phobson/seaborn,petebachant/seaborn,arokem/seaborn,mwaskom/seaborn,mwaskom/seaborn