Merge pull request openpathsampling#646 from dwhswenson/0.9.2

0.9.1 => 0.9.2

fix AWS

Merge pull request openpathsampling#581 from jhprinz/copyreplace

Implement `Copy_with_replacements`

Merge pull request openpathsampling#581 from jhprinz/copyreplace

Implement `Copy_with_replacements`