Update HACKING with current information

Updates information about the current Reno release notes management.
Some stale or incorrect information was also removed.

Change-Id: I9ea25a538f2e75966f721f3c5b551d83487fb015

HACKING.rst

@@ -20,58 +20,28 @@ General
         ...
         raise  # OKAY
 
-Text encoding
--------------
-- All text within python code should be of type 'unicode'.
-
-    WRONG:
-
-    >>> s = 'foo'
-    >>> s
-    'foo'
-    >>> type(s)
-    <type 'str'>
-
-    RIGHT:
-
-    >>> u = u'foo'
-    >>> u
-    u'foo'
-    >>> type(u)
-    <type 'unicode'>
-
-- Transitions between internal unicode and external strings should always
-  be immediately and explicitly encoded or decoded.
-
-- All external text that is not explicitly encoded (database storage,
-  commandline arguments, etc.) should be presumed to be encoded as utf-8.
-
-    WRONG:
-
-    mystring = infile.readline()
-    myreturnstring = do_some_magic_with(mystring)
-    outfile.write(myreturnstring)
-
-    RIGHT:
-
-    mystring = infile.readline()
-    mytext = s.decode('utf-8')
-    returntext = do_some_magic_with(mytext)
-    returnstring = returntext.encode('utf-8')
-    outfile.write(returnstring)
-
 Release Notes
 -------------
-- Each patch should add an entry in the doc/source/index.rst file under
-  "MASTER".
+- Any patch that makes a change significant to the end consumer or deployer of an
+  OpenStack environment should include a release note (new features, upgrade impacts,
+  deprecated functionality, significant bug fixes, etc.)
 
-- On each new release, the entries under "MASTER" will become the release notes
-  for that release, and "MASTER" will be cleared.
+- Cinder Client uses Reno for release notes management. See the `Reno Documentation`_
+  for more details on its usage.
 
-- The format should match existing release notes.  For example, a feature::
+.. _Reno Documentation: http://docs.openstack.org/developer/reno/
 
-    * Add support for function foo
+- As a quick example, when adding a new shell command for Awesome Storage Feature, one
+  could perform the following steps to include a release note for the new feature:
 
-  Or a bug fix::
+    $ tox -e venv -- reno new add-awesome-command
+    $ vi releasenotes/notes/add-awesome-command-bb8bb8bb8bb8bb81.yaml
 
-    .. _1241941: http://bugs.launchpad.net/python-cinderclient/+bug/1241941
+  Remove the extra template text from the release note and update the details so it
+  looks something like:
+
+    ---
+    features:
+      - Added shell command `cinder be-awesome`  for Awesome Storage Feature.
+
+- Include the generated release notes file when submitting your patch for review.