Improve clustermap API examples (closes #1212)
Improve clustermap API examples (closes #1212)

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