Edeposit-amqp-aleph-link-export

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- Log record updated to include whole responses.

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- Added ability to use LinkDescription in `.document_urls` property.

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- document_url changed to list.

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- Implemented option to disable logging.
- Added ability to update itself automatically.
- ``None`` is now returned instead of blank array, when no response is ready.
- Added new parameter reason to output structure.

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- Added documentation.
- Fixed bugs.
- Added description.
- Small change in docs config.
- XSD added to XML output.
- Fixed XML mess.
- Fixed problem with loading of the database after restart.
- Fixed behavior, which let the response file in the directory, so it was processed over and over again.
- Added test for input's structure interface into ``RequestDatabase.add_request()``.

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- Added almost 100% test coverage (everything with meaning is covered).
- Fixed a LOT of bugs.
- Added docstrings for every member of the package.