Merge branch 'release/0.5.0' into develop
Use current file's directory last when deriving working directory.

This means we use any project folder or open folders first.
Use attached working directory settings on view, if available.
Merge branch 'feature/6-default-directory' into develop
Bump version number.
Update changelog.

Fixes issue #6.
Merge branch 'release/0.6.0'