Implemented basic functionality.
Added a lot of improvements mentioned in pull request #1.
Removed python hard dependency. zipfile cant handle files over 4GB.
Added basic dexterity support.
Updated dexterity tests.
Updated zipexportview.
Added zipping test.
Fixed crash when primary field is empty or no blob file.
Added check for empty representation.
Added translation.
Modified generation. ZipFile now integrated in ZipGenerator contextmanager.
Fixed import. pep8.
Fixed zip generation. Fixed directory structure in representation.
Added tabbedview support for selecting files.
Added translation for selected content.
Updated README.
Updated import.
Added browser zip download tests.
Disabled broken dexterity test.
Cleaned up bloated test case.