Adding directory legacy for old code.

Changing explicit solvers - Merson and Euler.

Renaming tnlArray to tnlMultiArray.

Finishing new template interface for GMRES.

so far).

Creating template GMRES solver.

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 timers.

Adding paralle reduction to SpMV in Rg CSR format.