Added catch to StationDeviationMetric readModel to stop Java
numberformatexceptions from trying to convert NaN's in the model file.
Added config.xml~ and log.txt to .gitignore
CoherencePBM now handles raw horizontals = ?HN,?HE (in addition to ?H1,?H2)
Moved channelArray selections out of the metrics and into StationMeta
methods (e.g., getContinuousChannels()).