[[Imported from SVN: r5965]]

[[Imported from SVN: r5964]]

For this now the TangentVector class of S^n has only n components,
while the EmbeddedTangentVector class still has n+1.
The code around it needs to be fixed accordingly.

[[Imported from SVN: r5963]]

remove the possibility to solve the inner problem with a truncated cg.  It never really worked and complicates the code

[[Imported from SVN: r5951]]

[[Imported from SVN: r5947]]

[[Imported from SVN: r5941]]

[[Imported from SVN: r5938]]

[[Imported from SVN: r5936]]

[[Imported from SVN: r5931]]