[HG DOLFIN] Update some C++ demos.

[dolfin-dDist1jlEr4dnm+ (DOLFIN)]

One or more new changesets pushed to the primary dolfin repository.
A short summary of the last three changesets is included below.

changeset: 7469:4ec260695199
tag: tip
user: "Garth N. Wells <gnw20-KWPb1pKIrIJaa/***@public.gmane.org>"
date: Tue Nov 17 08:27:29 2009 +0000
files: demo/function/nonmatching-interpolation/cpp/main.cpp demo/function/nonmatching-projection/cpp/main.cpp demo/pde/curl-curl/cpp/main.cpp demo/pde/dg/advection-diffusion/cpp/main.cpp demo/pde/dg/biharmonic/cpp/main.cpp demo/pde/dg/poisson/cpp/main.cpp demo/pde/elasticity/cpp/main.cpp demo/pde/equality/cpp/main.cpp demo/pde/functional/cpp/main.cpp demo/pde/hyperelasticity/cpp/main.cpp demo/pde/mixed-poisson/cpp/main.cpp demo/pde/nonlinear-poisson/cpp/main.cpp demo/pde/periodic/cpp/main.cpp demo/pde/poisson1D/cpp/main.cpp demo/pde/simple/cpp/main.cpp demo/pde/stokes/stabilized/cpp/main.cpp demo/pde/stokes/taylor-hood/cpp/main.cpp demo/pde/sym-dirichlet-bc/cpp/main.cpp site-packages/dolfin/expression.py
description:
Update some C++ demos.


changeset: 7468:e8a51029713a
user: "Garth N. Wells <gnw20-KWPb1pKIrIJaa/***@public.gmane.org>"
date: Tue Nov 17 00:32:41 2009 +0000
files: demo/pde/poisson/cpp/main.cpp dolfin/function/Expression.cpp dolfin/function/Expression.h
description:
Update Poisson demo.


changeset: 7467:0197ae520596
user: "Garth N. Wells <gnw20-KWPb1pKIrIJaa/***@public.gmane.org>"
date: Mon Nov 16 23:46:04 2009 +0000
files: dolfin/function/Expression.cpp dolfin/function/Expression.h site-packages/dolfin/compile_expressions.py
description:
Remove old Expreesion::eval(...) function.

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