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

Adding directory legacy for old code.

Implementing PDE solvers and time steppers.

Changing explicit solvers - Merson and Euler.

Renaming tnlArray to tnlMultiArray.

Finishing new template interface for GMRES.

so far).

Adding unit tests for tnlString, tnlObject and tnlArrayManager.

Adding new class tnlArrayManager for managing arrays - allocation/deallocation, load and save functions etc.
tnlVector is derived from tnlArrayManager.

Fixing operator == in tnlString.

Fixing timers.

Debuged row sorting in tnlMatrix.
Moving matrix format tests to matrix benchmark.

Adding links on matrices statistics in HTML and patterns in PDF to SpMV benchmark logs.

Fixing matrix formats test for full matrices.

This is the next step in the repositary restoration :-(.

There is gap of missing commits.