Changeset [fd8b403d51bd805b324cfd6e64dbcc1bc3c4971a] by Jed Brown

Add elasticity example

• The shell Jacobian and preconditioner (for linear elements) is correct even with the nonlinear strain tensor.

• Spectral convergence to manufactured solution is observed for a single element.

• There is some error with high order and multiple elements. This needs to be fixed before implementing an indefinite vector problem (Stokes).

References gh-3 http://github.com/jedbrown/dohp/...