Bugfix: Use relative path in StatisticalModel::Save method.
Bugfix: Use relative path in StatisticalModel::Save method.

The version group in HDF5 was specified using an absolute path instead of a relative. This breaks when the model is not stored at the default location (i.e. root) of the hdf5 file.

statismo/statismo,zarquon42b/statismo,heartvalve/statismo,livia-b/statismo,kaspermarstal/statismo,clangguth/statismo,tom-albrecht/statismo,zarquon42b/statismo,kaspermarstal/statismo,clangguth/statismo,kaspermarstal/statismo,tom-albrecht/statismo,zarquon42b/statismo,livia-b/statismo,clangguth/statismo,livia-b/statismo,zarquon42b/statismo,statismo/statismo,heartvalve/statismo,heartvalve/statismo,kaspermarstal/statismo,statismo/statismo,tom-albrecht/statismo,livia-b/statismo,heartvalve/statismo,tom-albrecht/statismo,statismo/statismo,clangguth/statismo