------------------
New Features
^^^^^^^^^^^^
- Allow initialization of ``ImageFileCollection`` from a list of files with no
location set. [374, 661, 680]
- Allow identification of FITS files in ``ImageFileCollection`` based on content
of the files instead of file name extension. [620, 680]
- Add option to use regular expression matching when filtering items in
``ImageFileCollection``. [480, 595, 682]
- Added an option to disregard negative values passed to ``create_deviation``
and assume the error is represented by the read noise [688]
- Add ``filter`` method to ``ImageFileCollection`` that creates a new
collection by filtering based on header keywords. [596, 690]
Other Changes and Additions
^^^^^^^^^^^^^^^^^^^^^^^^^^^
- Dropped support for Python 2.x and Astropy 1.x.
- Removed deprecated property ``summary_info`` of ``ImageFileCollection``.
- Improved handling of large flags in the ``bitfield`` module. [610, 611]
- Improved the performance of several ``ImageFileCollection`` methods. [599]
- Added auto_logging configuration paramenter [622, 90]
- Added support for .fz,.bz2, .Z and .zip file formats in ``ImageFileCollection``. [623, 644]
- Modified weights function to also accept 1D array in ``Combiner``. [634, 670]
- Added warning that ``transform_image`` does not apply the transformation to
the WCS [684]
- When creating a new object in ``wcs_transform``, WCS keywords in the header
are removed so that they are only stored in the WCS object [685]
- Improved warning for negative values in the array passed to
``create_deviation`` [688]
- Removed support for initializing ``ImageFileCollection`` from a table instead
of files. [680]
- More consistent typing of ``ImageFileCollection.summary`` when the collection
is empty. [601, 680]
Bug Fixes
^^^^^^^^^
- Function ``median_combine`` now correctly calculates the uncertainty for
masked ``CCDData``. [608]
- Function ``combine`` avoids keeping files open unnecessarily. [629, 630]
- Function ``combine`` more accurately estimates memory use
when deciding how to chunk files. [638, 642]
- Raise ``ValueError`` error in ``subtract_dark`` for when the errors have
different shapes [674, 677]
- Fix problem with column dtypes when initializing ``ImageFileCollection`` from
a list of file names. [662, 680]