Fixed errors in JAABAPlot if there are no per-frame mat files in the per-frame directory.
TODO: I could not load in the sex.mat file as it didn't exist, and no classifiers had been added yet, so I didn't know the location of the trx file. We will need to figure out a way to deal with this.
Merge branch 'master' of github.com:kristinbranson/JAABA