Added assert to at() methods.
Added untemplated KinectDepthSensorBase class and moved depth_error_function_ attribute to DepthSensor.
Added uint8_t specification of SensorDepthTraits.
Added pixel rectification before conversion to 3D points.
Added cv::CALIB_CB_FAST_CHECK flag to pattern extraction function.
Variable data renamed as matrix.
Two new classes *SimpleModelFit* and *SmoothModelFit* created each from *ModelFit* class.
Added WeightedPolynomialFit class to fit a polynomial to points with an associated weight.
Added a lookup table to the PolynomialMatrixSmoothModel class.
C style casts converted to C++ style ones.