RF: use "shape" instead of "direction", and make chunks (rather than subject) the default sa to split by
WEB: use separate plots for DSM, dendrogram and MDS plot
NF+ENH: support check for (and citation of) toolbox fast marching by Gabriel Peyre
BF: progress bar in distatis
OPT: use power method to compute largest eigenvalue
TST: update distatis unit test to ensure to progress is shown
RF+NF: update distatis to allow for negative correlations and different weighting schemes
ENH: show message about negative correlations just once
Merge branch 'master' into cimec2014