Introduction of crypto material managers and data key caching

Author: mattsb42-aws

CHANGELOG.rst

@@ -0,0 +1,34 @@
+=========
+Changelog
+=========
+
+1.3.0
+=====
+
+Major
+-----
+* Added cryptographic materials managers as a concept
+* Added data key caching
+* Moved to deterministic IV generation
+
+Minor
+-----
+* Added changelog
+* Fixed attrs usage to provide consistent behavior with 16.3.0 and 17.x
+* Fixed performance bug which caused KDF calculations to be performed too frequently
+* Removed ``line_length`` as a configurable parameter of ``EncryptingStream`` and
+   ``DecryptingStream`` objects to simplify class APIs after it was found in further
+   testing to have no measurable impact on performance
+* Added deterministic length eliptic curve signature generation
+* Added support for calculating ciphertext message length from header
+* Migrated README from md to rst
+
+1.2.2
+=====
+* Fixed ``attrs`` version to 16.3.0 to avoid `breaking changes in attrs 17.1.0`_
+
+1.2.0
+=====
+* Initial public release
+
+.. _breaking changes in attrs 17.1.0: https://attrs.readthedocs.io/en/stable/changelog.html

MANIFEST.in

@@ -1,3 +1,3 @@
-include README.md
+include README.rst
 include LICENSE
 include requirements.txt