camera: LinearCamera now implements the TransformationChain class.
camera: Make LinearCamera to new base class of linear transformations and move previous functionality to ManualCamera.
BUGFIX: Define translation destructor.
Merge pull request #112 from Makman2/camera

Camera
transformation: TransformationChain now inherits Transformation, so TransformationChain can contain itself.
camera: Adapt new ability of using TransformationChain as a Transformation.
Merge pull request #114 from Makman2/transformation_chain

Transformation chain
transformation: Implement identity transformation.
test: Test added for identity transformation.