[coordiantes] - changed logic in transformer to allow TICA to request lagged data only when necessary               - added simple interator interface to transfromer
[coordiantes] - changed logic in transformer to allow TICA to request lagged data only when necessary
              - added simple interator interface to transfromer

trendelkampschroer/PyEMMA,trendelkampschroer/PyEMMA,arokem/PyEMMA,arokem/PyEMMA