New models

[vitskvara]

Implement some of these models (probably in this order)

• AE
• AE ensemble (or maybe KitNet?)
• DAGMM = Deep autoencoding gaussian mixture model for unsupervised anomaly detection. Suggested by editor, it is actually a generative model.
• REPEN = Learning representations of ultrahigh-dimensional data for random distance-based outlier detection. Suggested by editor.
• OCGAN - this one is actually my favorite generative model that we have missed.
• Other?

[janfrancu]

Updated check boxes and reopened for future use