VMEX 0.11.5

• vmex --trace reports progress: the share of tmax traced, the elapsed
  time and an estimate of the time left, on stderr. The header states the
  ARIES-CS targets it scales to (#490).
• --trace defaults: 500 alphas, and a Boozer mode cut of 6e-4 instead of
  1e-3, which missed losses in precise quasisymmetry (#491). The tracer uses
  one CPU device per usable core. Floor essos>=0.19.2.
• --trace benchmarked against SIMPLE and SIMSOPT (#482).
• Fixed-boundary optimization rejects trials whose anchor stalls far from
  the root. Its adjoint is preconditioned with the anchor's block factors.
  Free-boundary restarts start from the reference state alone, and those that
  stall far from ftol go straight to the ladder (#483-#486).
• MgridField takes the interpolation order, and a deck's mgrid field can be
  built at either order (#461, #463, #479). The interior field's accuracy is
  documented against an exact equilibrium (#462).
• Turbulence objectives use GKX's forward-mode eigenpair rule (#480).
• plan.md is retired, and the README is shorter (#481, #487, #493).