message: Added blurb for the incompressible neo-hookean integrator
diff: @@ -71,7 +71,9 @@ public:
  virtual ~NonlinearFormIntegrator() { }
  };
  -
  +/** The abstract base class BlockNonlinearFormIntegrator is
  + a generalization of the NonlinearFormIntegrator class suitable
  + for block state vectors. */
  class BlockNonlinearFormIntegrator
  {
  public:
  @@ -252,7 +254,9 @@ public:
  const Vector &elfun, DenseMatrix &elmat);
  };
  -
  +/** Hyperelastic incompressible Neo-Hookean integrator with the PK1 stress
  + \f$P = \mu F - p F^{-T}\f$ where \f$\mu\f$ is the shear modulus,
  + \f$p\f$ is the pressure, and \f$F\f$ is the deformation gradient */
  class IncompressibleNeoHookeanIntegrator : public BlockNonlinearFormIntegrator
  {
  private:
  