New conservative transfer function scheme.
New random number generator that preserves coarse Fourier modes instead of applying Hoffman-Ribak
Some minor bugs fixed.
* Moved hybrid poisson solver from convolution_kernel.cc to poisson.cc
* Fine-tuned deconvolution schemes for various running modes
* Added lots of doxygen documentation
Fixed a bug with top grid kernel normalization, this reduces errors a bit.
A non-cubic grid is now extended to a cubic grid in the density calculation. This should reduce artefacts due to TF truncation.
Added a new (undocumented and internal) parameter that forces grid centering on the specified refinement region also in unigrid mode. This should in the future also obey that the shift comes in multiples of the top grid cells (which are however unknown).
Fixed a bug in the generic output plugin that caused non-cubic grids to be cut to cubic grids.
Fixed a bug causing wrong shift-backs of particle positions for Gadget.
Disabled optimized unigrid mode as it did not work in all circumstances (issue posted).