Inqbus-tagging

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* Bugfix:
(src/lxml/lxml.etree.c:47744)
IndexError: list index out of range

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* Removed entrypoints
* Updated MANIFEST.in

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* Improved Documentation/Readme
* Corrected dependencies

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* Added MANIFEST.in to make package installable

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* Some smaller changes ind Readme and setup.py to improve the documentation

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* Autotagging for Images based on meta information and title
* Autorotation for Images based on Exif
* Possibilities to configure Autotagging
* Managing Keywords by a modified KeywordManager
* Retaging and Previews for Folder-Contents-View