Update trainingPipe.m

SVM: SVM = 1, DeCAF = 0
Knn w/ bear features: SVM = 0, DeCAF = 0
Knn w/ DeCAF features: SVM = 0, DeCAF = 1

01_pos.mat and 02_neg.mat (from the project training images folder) need to be located in the same directory as the .m file.