This commit moves the kernels in the correct sub-directory.
It creates new header file for Thrust kernels. It splits the
kernels into two files: 'normalize.cu' contains CenterNet
pre-processing operations, 'postprocessing.cu' contains the
CenterNet post-processing operations.
Signed-off-by: Davide Sapienza <sapienza.dav@gmail.com>
Davide Sapienza