Logistic regression

Replacing LIBSVM logistic regression with an implementation using GSL. Matches results of R logistic regression. Removes fortran dependency

Also, added a filter for training to only load reads we will use for training to avoid unnecessary memory requirements for training allelotype.

Added new noise model files. Will probably remake these with more data and for a bigger variety of dataset types before releasing. Keeps same format as old noise model files, minus the stutterproblem file.