Omniduct

A minor release that fixes pruning of empty caches.

This is a minor release adding several new features.

New Features:
- Support for pruning the cache by specifying the target number of cached items.
- A more flexible configuration parser that is backward compatible with configurations from previous versions but relaxes the requirement that all duct configurations are equally nested (in response to 97).

Minor improvements:
- Omniduct will no longer insert its version into the source string during presto queries, better allowing downstream users to use it for query policies / etc.

This is a minor release which fixes an invalid version constraint on the `interface-meta` dependency that prevents Anaconda environments from correctly parsing Omniduct's dependencies.

This is a minor release with the addition of a new database backend for Exasol (contributed by foxyblue in 99; thanks!).

This is a minor release which does not install `enum34` on Python 3.4+ where it is not necessary, and has caused some trouble with other packages.

It also has some documentation fixes from foxyblue (100 102). Thank you!

This is a minor release fixing a bug introduced in v1.1.4 for SSH clients preventing connections due to cyclic references in the `connect()` method of `SSHClient`.