Implement adaptive choice of q for homotopy

[chenwilliam77]

1. Homotopy: adaptively choose q

2. Relaxation: adaptively choosing the damping weight

Proposed adaptivities

• Naive: use hyperparameters to choose a simple updating scheme for q and damping, noting that both of these terms must fall between 0 and 1.

• use switched evolution relaxation

• Homotopy continuation: https://www.researchgate.net/publication/229754789_A_continuation_method_based_on_a_high_order_predictor_and_an_adaptive_steplength_control or https://arxiv.org/pdf/math/0605105.pdf