Minor edits in OpenCL and CUDA backend for setting key and counter.
Changed unsigned long long to uintl.

Minor corrections for double and cdouble kernels. Test for normal
distribution.

Improved test for normal and uniform.

Removed af_random_type as template parameter in cuda and opencl
backends.

Small change in OpenCL kernel generation function to fix segfaults.

Disambiguated overloaded functions in kernel folder.

setSeed and getSeed

Removed unneeded header files

Because Apple is "special".