Matplotview

Line scaling falls back gracefully when a projection doesn't transform the unit box correctly, fixing rendering for geographic projections.

This update contains the following changes:
- Artist rendering has been modified to handle scenarios where the axes returns a invalid data clip box, allowing views to be used with map based axes and projections.
- Plots including views can now be pickled and unpickled without error.
- Views now have getter and setter methods for the additional attributes they add to the axes.

This release fixes a few bugs, improves artist clipping management, and adds support for alternate projections (3D, polar, and etc.)

- 3D Example:

- Polar Example:

Release Changes:
- Rendering improved to support recusive drawing allowing for fractals, etc.
- Support added for filtering items drawn in a view.

Fractal Example:

Artists of a view will now be rendered in the correct order, rendering based on zorder rather then always being rendered under the artists of the axes being viewed.

Initial Release

Introduces a simple API for creating views.
- Ability to create views of other axes using the `view` method.
- Additional convenience method `inset_zoom_axes` added, for creating inset axes that are views of the parent axes