upgrades and documentation

Are there plans to create CRAN glmnet-like features and documentation?

Features that are helpful from glmnet:

1. k-fold CV
2. plotting - cv MSE and lambda plots (including degrees of freedom on the top x-axis too).

Thanks

[AsafManela]

Docs can certainly be improved. PRs welcome.

As for the features:

1. k-fold CV is supported. See example here
2. Plotting is provided by the LassoPlot.jl package