Merge paylogic#66: Support for registering custom cache backends

See pull request 66 on GitHub:
  paylogic#66

LICENSE.txt

@@ -1,4 +1,4 @@
-Copyright (c) 2015 Peter Odding and Paylogic International
+Copyright (c) 2016 Peter Odding and Paylogic International
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

README.rst

@@ -296,7 +296,7 @@ License
 This software is licensed under the `MIT license`_ just like pip_ (on which
 pip-accel is based).
 
-© 2015 Peter Odding and Paylogic_ International.
+© 2016 Peter Odding and Paylogic_ International.
 
 
 .. External references:

docs/conf.py

@@ -1,7 +1,7 @@
 # Accelerator for pip, the Python package manager.
 #
 # Author: Peter Odding <[email protected]>
-# Last Change: November 14, 2015
+# Last Change: January 10, 2016
 # URL: https://github.com/paylogic/pip-accel
 
 """Sphinx documentation configuration for the `pip-accel` project."""
@@ -34,7 +34,7 @@
 
 # General information about the project.
 project = u'pip-accel'
-copyright = u'2015, Peter Odding and Paylogic International'
+copyright = u'2016, Peter Odding and Paylogic International'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the

pip_accel/__init__.py

@@ -1,7 +1,7 @@
 # Accelerator for pip, the Python package manager.
 #
 # Author: Peter Odding <[email protected]>
-# Last Change: December 28, 2015
+# Last Change: January 10, 2016
 # URL: https://github.com/paylogic/pip-accel
 #
 # TODO Permanently store logs in the pip-accel directory (think about log rotation).
@@ -76,7 +76,7 @@
 from pip.exceptions import DistributionNotFound
 
 # Semi-standard module versioning.
-__version__ = '0.37.1'
+__version__ = '0.38'
 
 # Initialize a logger for this module.
 logger = logging.getLogger(__name__)

pip_accel/caches/__init__.py

@@ -27,7 +27,7 @@
 
 # External dependencies.
 from humanfriendly import concatenate, pluralize
-from pkg_resources import get_entry_map
+from pkg_resources import iter_entry_points
 
 # Initialize a logger for this module.
 logger = logging.getLogger(__name__)
@@ -145,7 +145,7 @@ def __init__(self, config):
  object).
  """
  self.config = config
- for entry_point in get_entry_map('pip-accel', 'pip_accel.cache_backends').values():
+ for entry_point in iter_entry_points('pip_accel.cache_backends'):
  logger.debug("Importing cache backend: %s", entry_point.module_name)
  __import__(entry_point.module_name)
  # Initialize instances of all registered cache backends (sorted by