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

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

Implementing the matrix formats tests.

Adding explicit template instantiation.
Moving some _impl.h files into implementation dir.

There is gap of missing commits.

Fixing my name in source files :).