Pdfcropmargins

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New features:

* The GUI interface has been updated slightly to be easier to use.

* Added a new option ``--version`` that just prints out the pdfCropMargins
version number.

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Bug fixes:

* Fixed minor bug in handling negative thresholds and improved display in GUI when
``--gsBbox`` is selected.

* Fixed a bug in the restore option which caused it to fail when pre-cropping was
used. It previously saved (and restored) the modified pre-crop values.

* Fixed the wait-indicator message (displayed during cropping) not becoming
visible in recent versions of PySimpleGUI.

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New features:

* Users can now call the program from their Python code by importing the ``crop``
function.

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Bug fixes:

* Added typing dependency for GUI with Python <= 3.4.

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New features:

* Added a graphical user interface (GUI) which allows PDF files to be interactively
cropped with different settings without having to re-render the pages.

* An option ``--pageRatiosWeights`` which also takes per-margin weights to determine
what proportion of the necessary padding to apply to each margin.

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New features:

* An option ``--uniformOrderStat4`` (shortcut ``-m4``) has been added to allow
setting the order statistic (for how many smallest delta values to ignore)
individually for each margin.

* Verbose mode now prints out the pages on which the smallest delta values were
found, for better tuning of crop commands.

Bug fixes:

* Fixed a bug in the interaction of the ``-u``, ``-pg``, and ``-e`` options.