Enable more tests on Travis
Use the RNG we created, not the default numpy one
Fix in random_dense_design_matrix without labels
Fix "dictionary changed size during iteration" in python 3
fix for quickstart on python3
Add documentation for the 'axes' argument of DenseDesignMatrix.
Use a nicer error message if the user provides a topo_view with
the wrong number of dimensions.
Fix docstring formatting
Merge pull request #1269 from bartvm/matplotlib

Enable more tests on Travis
Merge pull request #1291 from icoxfog417/fix_for_py3_quickstart

fix for quickstart on python3
Merge pull request #1293 from julienr/topo_view_doc_fixes

Adds documentation for the 'axes' argument of DenseDesignMatrix.
Move Abstract.__call__ method to AbstractEncoder

This makes its subclasses such as DeepComposedAutoencder work correctly