Changing indexing in grids.

Explicit instantiation of template CUDA reduction.

TNL can be compiled without CXX11 support.

Adding directory legacy for old code.

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.