implement even more bases

[dsteinberg]

Orthogonal Random Features (https://arxiv.org/abs/1610.09072)

• [x] RBF ORF
• [ ] RBF SORF

Neural Net

• [ ] Random Arc-cosine (see #128)

Random dot product kernels:

• [ ] http://www.jmlr.org/proceedings/papers/v22/kar12/kar12.pdf

Fast Food

• [ ] Piecewise linear basis (A La Carte paper)

Other (Maybe):

• [ ] Tensor Sketch polynomial (http://www.itu.dk/people/pagh/papers/tensorsketch.pdf)
• [ ] Feature hashing (http://scikit-learn.org/stable/modules/feature_extraction.html#feature-hashing)
• [ ] Fourier bases
• [ ] Wavelet bases