Re-add local pyown usage with local api-key. Refactored OWNApi into …

[ulno]

…real wrapper that can use local api_key or default to doing web requests to mycroft.

As discussed with @forslund in the forums.

This allows the weather skill to use a personal OWM api_key (at least when set in local settings.json) and if proxy is set to false.

This effort is probably duplicating issue #27.

Building a connector adapter (that itself could use for example mqtt) into this wrapper might also address issues #98, #100, #115