Modified some VisualizationFrame tests
Added Cyliner instead of mesh shape
Replaced mesh_shape with shape
Added non-trivial numerical values for tests.
removed * imports.
Changed Shape from mesh to Cylinder
Removed Shape from optional arg
PEP8
Added tests for Perspective and Orthographic Camera
Updated for PEP8
Corrected some import error
Camera tests
Merge pull request #16 from tarzzz/extend-visualization-frame-tests

Extend visualization frame tests