(PECL svm >= 0.1.5) Get the sigma value for regression types

(PECL svm >= 0.1.00.1.0) Load a saved SVM Model

(PECL svm >= 0.1.0) Save a model to a file

(PECL svm >= 0.1.5) Get the labels the model was trained on

(PECL svm >= 0.1.5) Returns true if the model has probability information