Fix import in plotting.py
Fix plotting examples
Merge branch 'bugfix/fix-plotting-after-refactor' into bugfix/refactor-broke-docs

Conflicts:
	examples/plot_distarray_block_axis_0.py
	examples/plot_distarray_block_axis_1.py
	examples/plot_distarray_block_block.py
	examples/plot_distarray_block_cyclic.py
	examples/plot_distarray_cyclic_cyclic.py
Fix API docs and docstrings.
Merge pull request #362 from enthought/bugfix/refactor-broke-docs

Fix API reference