ex3: Next (v2) working GPU version - use of CURAND as rng

ex3: Working (v1) initial GPU version

ex3: Initial (v0) version - working CPU with OpenMP

ex2: Final version (v5) of audiofir - static rank, unroll of loops

ex2: Final, fourth version of audiofir (v4) - tiling algorithm

ex2: Rename audiofir1.cu into audiofir.cu

ex2: Move implementation of audiofir0.cpp to audiofir.cpp