Can build shared library for python bindings by specifying
-DBUILD_PYTHON=ON when calling cmake. This requires pybind11
to be cloned into build's parent directory. The python bindings
expose a very minimal interface: it allows construction of a
`GraspDetector` and calling `detectGrasps` which accepts a
previously instantiated `GraspDetector` and a point cloud as a
numpy array (of shape (n, 3)). This function returns a numpy
array of shape (number of grasps, 14) where the columns specify
the position, orientation (rotation matrix in row-major order), the width
of the gripper, and the score of the grasp.

Accept position of the camera to be input to the point cloud.

Fixed bug introduced with setting camera viewpoint.

Adding some testing code as well.