Batch-wise backtracking line search for full-gradient optimization algorithms.

[GeoffNN]

Working backtracking line search for different algorithms.

• [ ] Frank-Wolfe family, cf https://arxiv.org/abs/1806.05123
• [x] Proximal gradient descent, cf https://people.eecs.berkeley.edu/~elghaoui/Teaching/EE227A/lecture18.pdf