Adding OpenMP support.

Renaming getParameterType to getType.

TNL can be compiled without CXX11 support.

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

Adding simple template of project with Makefile to examples.
Adding cmake tests for PETSc for testing of solvers.

Finishing new template interface for GMRES.

so far).

Adding unit tests for tnlString, tnlObject and tnlArrayManager.