Clean up: consistently use spaces instead of tabs (Matlab standard), remove author and last-modified-notes, formatting fixes

fix for:

>> bla = projectionAlgorithm();
Not enough input arguments.
Error in projectionAlgorithm (line 150)
if isfield(settings, 'algorithm') && strcmpi(settings.algorithm, 'raar')

Removed laplace2: does the same as fftfreqNormSq except for a minus and the limitation to 2D-setting