Add CHAMELEON_SIMULATION_MAGMA option to select whether to enable magma kernels or not in simulation mode

add cudablas library to make calls to cuda kernels (magma here, cublas will follow), no more calls to magma in runtime/starpu codelets

change the way we include our own header files --> relative to the root - when plasma is in the same env, chameleon can take some headers not belonging to it (ex: #include descriptor.h, this file states in plasma install dir also) which make compilation errors

magma_ztsqrt_gpu is now defined in magma-1.6.0: change the name of our magma routine in magma_ztsqrt2_gpu

change copyright - correct whitespace - place cmake module depending on chameleon in cmake_modules and no more in cmake_modules/morse