Make rle and openjpeg requirements optional (#66)

* Make rle and openjpeg requirements optional
* Update version and add release note
* Fix package name in module docstring

Author: hackermd

README.md

@@ -15,6 +15,14 @@ A Python 3.6+ framework for decoding JPEG images and decoding/encoding RLE datas
 pip install pylibjpeg
 ```
 
+##### Installing extra requirements
+
+The package can be installed with extra requirements `openjpeg` or `rle` to enable support for JPEG-2000 and Run-Length Encoding (RLE), respectively:
+
+```
+pip install pylibjpeg[openjpeg,rle]
+```
+
 #### Installing the development version
 
 Make sure [Git](https://git-scm.com/) is installed, then

docs/release_notes/v1.4.0.rst

@@ -0,0 +1,6 @@
+.. _v1.4.0:
+
+1.4.0
+=====
+
+* Made pylibjpeg-openjpeg and pylibjpeg-rle dependencies optional (using `extras_require`)

pylibjpeg/_version.py

@@ -1,9 +1,9 @@
-"""Version information for pynetdicom based on PEP396 and 440."""
+"""Version information for pylibjpeg based on PEP396 and 440."""
 
 import re
 
 
-__version__ = '1.3.0'
+__version__ = '1.4.0'
 
 
 VERSION_PATTERN = r"""

setup.py

@@ -48,7 +48,11 @@
         "Topic :: Software Development :: Libraries",
     ],
     packages = find_packages(),
-    install_requires = ['numpy', 'pylibjpeg-openjpeg', 'pylibjpeg-rle'],
+    extras_require = {
+        'rle': ['pylibjpeg-rle'],
+        'openjpeg': ['pylibjpeg-openjpeg']
+    },
+    install_requires = ['numpy'],
     include_package_data = True,
     zip_safe = False,
     python_requires = ">=3.6",