The problem is that for example Arch Linux symlinks python to python3,
which has different syntax (e.g. print is a function instead of a
statement).

Used shorter __cuda_callable__ instead of __host__ __device__ and
testing if HAVE_CUDA is defined.

Conflicts:
	.cproject
	CMakeLists.txt
	install

RowLengths was renamed to CompressedRowsLengths.
OpenMP support wads added to matrix-vector multiplication and to scalar
products.
CSR format can use Cusparse for SpMV.

Adding CUDA architecure and CUDA cores to log.

simple-solver and make-project were removed from examples.

Scripts tnl-compile and tnl-link were added.

Min. interations feature was fixed in the GMRES method.
Timers for explicit and semi-implicit timestepping were added.

Parallel reduction in CUDA fixed.
Boundary conditions in linear system assembler fixed.
Min. iterations for linear solvers fixed.