added method DrawPCABasisSample
added new DeformationModelTransform that interpolates the components
bugfix in GetCovarianceForPoint. Noise variance was added to all elements, instead of only the diagonal
added interpolatingSTatisticalDeformationModelTransform.h
Merge remote-tracking branch 'upstream/development' into development
First version of a new history mechanism for the model info.

In previous versions, there was only one field modelInfo, which was updated
whenever a new model was built from an old one (e.g. for the partiallyFixedModelBuilder).
Now the old information is kept and a new BuilderInfo object is added. Thus it effectively
keeps a history of changes that were applied to the model
link against vtkPythonCore
fixed minor issue
changed time processing in modelinfo to make it compile on windows (untested)
Merge remote-tracking branch 'origin/development' into development

Conflicts:
	statismo/ModelInfo.cxx
Merge branch 'development' of https://github.com/marcelluethi/statismo into marcelluethi/development
merged pull request