Django-watermark

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- added the ability to remove alpha introduced with the watermark effect
- dropped support for Python 2.x, removed deprecated code and various bugfixes
- removed 10px margin introduced in 0.1.7

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- python_2_unicode_compatible import error for latest django version 3.0.13 bug fix
- fixed bug cannot write mode RGBA as JPEG

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- python 2.x and 3.x bugfixes

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- makes it easy for browsers like Mozilla and Opera get the correct url of images
- added a 10px margin from corners to apply watermark
- resize watermark before calculating its position
- apply anti-aliasing on watermark
- django >= 1.4 timezone support
- python 3 compatibility
- pillow compatibility

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- refactored a good deal of the code inside the watermark filter and placed it in utils.py.
Now the filter is mostly just an interface to the utils.watermark function.
- removed the "parameter precedence" with positioning, tiling, and scaling.
Now they can all be used at the same time.
- added several enhancements to the positioning and tiling features in particular

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- added the ability to randomly position watermarks
- removed the "top-left" part of positioning--meaning that position=50%x50%
actually centers the watermark image instead of centering the top-left corner
of the watermark image
- added watermark rotation