Also: fix more bugs in the implementation of the derivative of gfe
function gradients wrt the coefficients.  This appears to work now,
but inexact evaluations remain an issue.

[[Imported from SVN: r7180]]

[[Imported from SVN: r7179]]

[[Imported from SVN: r7177]]

rename method assembleHessian of AverageDistanceAssembler to assembleEmbeddedHessian, to make clearer what it does

[[Imported from SVN: r7175]]

[[Imported from SVN: r7133]]

add a method with an fd approximation of the derivative of the function gradient.  only for testing purposes

[[Imported from SVN: r7130]]

[[Imported from SVN: r7128]]

[[Imported from SVN: r7127]]

[[Imported from SVN: r7126]]

[[Imported from SVN: r7125]]

transpose one gradient matrix.  This makes the code run, but it still doesn't work even for RealTuple<1>

[[Imported from SVN: r6547]]

[[Imported from SVN: r6546]]

[[Imported from SVN: r6545]]

[[Imported from SVN: r6544]]

übersetzt jetzt und stürzt nicht ab.  Es kommt allerdings noch Unfug raus.

[[Imported from SVN: r6451]]

[[Imported from SVN: r6301]]

[[Imported from SVN: r6298]]

[[Imported from SVN: r6297]]

[[Imported from SVN: r6215]]

That makes the code more readable, which is more important to me than
speed.  The stuff is difficult enough as it is.

[[Imported from SVN: r6214]]

[[Imported from SVN: r6213]]

factor out the computation of the linear part of the reference-simplex-to-standard-simplex computation

[[Imported from SVN: r6212]]

[[Imported from SVN: r6211]]

[[Imported from SVN: r5938]]

[[Imported from SVN: r5931]]

[[Imported from SVN: r5804]]

[[Imported from SVN: r5716]]

[[Imported from SVN: r5697]]

[[Imported from SVN: r5695]]

[[Imported from SVN: r5600]]

[[Imported from SVN: r5598]]

[[Imported from SVN: r5596]]

[[Imported from SVN: r5593]]

[[Imported from SVN: r5565]]

[[Imported from SVN: r5556]]

[[Imported from SVN: r5525]]

remove code for interpolation via recursive geodesics.  It is invariant under permutation of the vertices

[[Imported from SVN: r5511]]

[[Imported from SVN: r4470]]

[[Imported from SVN: r4138]]

[[Imported from SVN: r4133]]