Created a pre-parallel version

Created a pre-parallel version to ensure correct logic, before
impelementing on CUDA.
Pre-parallel Horse Moves

Created implementation of Horse Moves for pre-parallel. It was observed
that, in this application, we don't have much advantage on queue
processing. But, in the implementation of 8-Puzzle we can see that
there's  a big difference.
Serial and Pre-parallel 8-Puzzle

Created serial and pre-parallel implementation of 8-Puzzle.
We can see good results in terms of queue processing in respect to the
bandwidth.