[[Imported from SVN: r4103]]

make the inner solver a pointer to a generic Solver class, in anticipation of using a truncated cg there

[[Imported from SVN: r4102]]

[[Imported from SVN: r4100]]

[[Imported from SVN: r4082]]

[[Imported from SVN: r4081]]

[[Imported from SVN: r4080]]

[[Imported from SVN: r4079]]

[[Imported from SVN: r4078]]

[[Imported from SVN: r4077]]

simpler evaluate of the function value.  Now only works with in the triangle, because there are some singularities lurking outside

[[Imported from SVN: r4076]]

- fix a bug when setting up the Dirichlet nodes

[[Imported from SVN: r4073]]

[[Imported from SVN: r4072]]

[[Imported from SVN: r4071]]

[[Imported from SVN: r4069]]

[[Imported from SVN: r4068]]

[[Imported from SVN: r4067]]

bugfix: we need the derivative of the geodesic interpolation in the gradient computation (chain rule), not the derivative of the velocity interpolation

[[Imported from SVN: r4066]]

for debugging: add a method to compute gradients of local geodesic fe functions by finite-difference approximation (only 2d)

[[Imported from SVN: r4065]]

[[Imported from SVN: r4063]]

[[Imported from SVN: r4062]]

[[Imported from SVN: r4061]]

implement interpolation of the gradient for members of SO(3), some of this is still educated guesswork, though

[[Imported from SVN: r4060]]

[[Imported from SVN: r4059]]

[[Imported from SVN: r4058]]

[[Imported from SVN: r4057]]

[[Imported from SVN: r4056]]

[[Imported from SVN: r4055]]

[[Imported from SVN: r4054]]

[[Imported from SVN: r4053]]

[[Imported from SVN: r4052]]

[[Imported from SVN: r4051]]

[[Imported from SVN: r4050]]

[[Imported from SVN: r4049]]

[[Imported from SVN: r4048]]

[[Imported from SVN: r4047]]

[[Imported from SVN: r4046]]

[[Imported from SVN: r4045]]

RodSolver is now called RiemannianTrustRegionSolver, and can be parametrized with the TargetSpace.  Some remains of RigidBodyMotion are still there, though.

[[Imported from SVN: r4041]]

[[Imported from SVN: r4040]]

[[Imported from SVN: r4039]]