Adding tnlDomain.

src/core/vectors/tnlSharedVector.h

src/core/vectors/tnlVector.h

.../initial_conditions/level_set_functions/tnlBlobFunction.h

..._conditions/level_set_functions/tnlPseudoSquareFunction.h

src/functions/initial_conditions/tnlCylinderFunction.h

src/functions/initial_conditions/tnlFlowerpotFunction.h

src/functions/initial_conditions/tnlTwinsFunction.h

src/functions/tnlBoundaryOperatorFunction.h

src/functions/tnlConstantFunction.h

src/functions/tnlDomain.h

src/functions/tnlExactOperatorFunction.h

src/functions/tnlExpBumpFunction.h

src/functions/tnlFunctionAdapter.h

src/functions/tnlMeshFunction.h

src/functions/tnlMeshFunctionEvaluator.h

src/functions/tnlOperatorFunction.h

src/functions/tnlSinBumpsFunction.h

src/functions/tnlSinWaveFunction.h

src/functions/tnlTestFunction.h

src/operators/diffusion/tnlExactLinearDiffusion.h