Added a basic Shape class
Shape class completed
Merge pull request #9 from tarzzz/Shape-and-subclasses

Shape and subclasses
Modified some tests for __str__()
Modified some tests for shapes __str__()
Merge pull request #10 from tarzzz/tests-shape-modifications

Modified some tests for __str__()
Added tests for Shape class
Merge pull request #11 from tarzzz/test-Shape-class

Test shape class
Modified Cylinder tests
Merge pull request #12 from tarzzz/tests-cylinder-modifications

Modified Cylinder tests
Minor Error correction in tests
Modified some errors on Octahedron tests. Issue with the strings
Changed according to PEP8
Merge pull request #13 from tarzzz/tests-cylinder-modifications

Minor Error correction in tests
Added some numeric transform tests
Merge pull request #15 from tarzzz/extend-visualization-frame-tests

Added some numeric transform tests