v0.5.1

[lxvm]

This patch restores a few features from v0.4. In all, it does:

• fix a misleading point in the docs and make some other improvements
• fix performance of captured variables in KineticCoefficientSolvers and ElectronDensitySolvers
• reinstates heuristics for AutoPTR step sizes (now prints a message explaining so)
• addresses a tolerance scaling question about how to set an integration tolerances for a transport distribution when multiplied with a Fermi window function by doing nothing to the caller's tolerance, since the integrated weight of the window function is close to unity. Previously the user had to set part of this tolerance, which we dealt with in v0.5 by having the user set only the overall tolerance for the solver

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 82.50000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 43.20%. Comparing base (43e8889) to head (7d8e806).

Files	Patch %	Lines
src/ElectronDensitySolver.jl	77.77%	2 Missing :warning:
src/definitions.jl	83.33%	2 Missing :warning:
src/wannier90io.jl	0.00%	2 Missing :warning:
src/KineticCoefficientSolver.jl	91.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #34 +/- ## ========================================== + Coverage 41.78% 43.20% +1.41% ========================================== Files 20 20 Lines 1558 1574 +16 ========================================== + Hits 651 680 +29 + Misses 907 894 -13 ```

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