Omniduct

This is a minor bugfix release that fixes clobbering of WebHDFS hostnames when host is manually set, and to correctly extract the hostname from the list.

This is a minor release with two changes:

- Added support for custom requests session in presto connections (106) [thanks gthomas-slack]
- A usability fix for the `webhdfs` client when namenodes are specified but host is not (104) [thanks gloutsch]

This is a minor release with some additions and bugfixes.

- `DatabaseClient` instances gained a new method `table_partition_cols`, which returns the columns on which a table is partitioned. An implementation was added for Presto.
- Fixed subclasses of `Duct` breaking when `__getattr__` was implemented.
- Allow usage of the backward compatible `interface_meta` 1.2.
- Minor docstring improvements.

A minor release with a bug fix for `has_logged` not being populated in some circumstances.

This is a quick fix for breaking changes to werkzeug, from which we were only using its lazy object wrapper. We replace it with `lazy-object-proxy`.

This is a minor release allowing the override of automatic logging scope names, as well as a rewrite of the registry proxy classes.