coef.glinternet         Return main effect and interaction
                        coefficients.
glinternet              Fit a linear interaction model with group-lasso
                        regularization that enforces strong hierarchy
                        in the estimated coefficients
glinternet.cv           Cross-validation for glinternet
plot.glinternet.cv      Plot CV error from 'glinternetCV' object.
predict.glinternet      Make predictions from a "glinternet" object.
predict.glinternet.cv   Make predictions from a "glinternetCV" object.
