Switched no 1-way trip warning to logger.warn
Switched no 1-way trip warning to logger.warn

choderalab/openpathsampling,choderalab/openpathsampling,dwhswenson/openpathsampling,dwhswenson/openpathsampling,openpathsampling/openpathsampling,openpathsampling/openpathsampling,choderalab/openpathsampling,openpathsampling/openpathsampling,jhprinz/openpathsampling,openpathsampling/openpathsampling,dwhswenson/openpathsampling,jhprinz/openpathsampling,jhprinz/openpathsampling,dwhswenson/openpathsampling