[AstroPy] ccdproc 2!

[Craig, Matthew W]

Hi,

We are delighted to announce the release of ccdproc version 2.  See ccdproc.readthedocs.io for installation instructions or read on...

This is the first release of ccdproc that is Python 3 only!

A special thanks to first-time code contributors Jaime A. Alvarado-Montes, Julio C. N. Campagnolo, Mihai Cara, Michael Hlabathe, and Luca Rizzi, and to everyone who opened issues.

**New and improved**

The `ImageFileCollection` for working with sets of images has several new features:

	+ Construct a collection from an explicit list of files.
	+ Filter files using regular expression matching.
	+ Create a new collection by filtering an existing collection.

**Other new features include:**

	+ Weights in image combination can be a 1D array.
	+ Reduced memory in image combination.
	+ Many fewer files open during image combination when using memory mapping and breaking the image stack into chunks.
	+ Better performance and a wider array of compression types for `ImageFileCollection`.
	+ Better handling of constructing error array when some image value are negative.
	+ Better computation of boolean mask from bit planes.

—> In addition, several bugs were fixed: https://github.com/astropy/ccdproc/blob/v2.0.0/CHANGES.rst


**Installation**

You can install the latest version (which is actually 2.0.1) with conda or with pip:

conda install -c astropy ccdproc=2

OR

pip install ccdproc

If you are updating from an earlier version of ccdproc using pip do this: pip install -U ccdproc

Sincerely,

Matt Craig, Steve Crawford and Michael Seifert
ccdproc maintainers