component/seaborn: add seaborn.

component/seaborn/buildout.cfg

+[buildout]
+extends =
+  ../pandas/buildout.cfg
+  ../matplotlib/buildout.cfg
+  ../statsmodels/buildout.cfg
+
+parts =
+  seaborn
+
+[seaborn-env]
+<= pandas-env
+
+[seaborn]
+recipe = zc.recipe.egg:custom
+egg = seaborn
+environment = seaborn-env
+setup-eggs =
+  ${pandas:egg}
+  ${matplotlib:egg}
+  ${statsmodels:egg}