Recreated man documentation to address CRAN request.
Added check-standard github action.
Reformatted all C++ code with clang-format.
Added #include <complex> to Toeplitz.h.
Set seed on all tests to avoid random failures due to numerical precision.
The following functions are now defunct: rSnorm(), dSnorm(), Snorm.grad(), Snorm.hess(). Replacements are rnormtz(), rnormtz() and the $grad() and $hess() methods in the NormalToeplitz class.
Added NormalToeplitz and NormalCirculant classes in R and C++.
using namespace in header files.