Add missing release notes

docs/source/release-notes/2.6.0.rst

@@ -0,0 +1,15 @@
+2.6.0 - 2016-06-15
+------------------
+
+- **Requirements Change** Switch to pycodestyle as all future pep8 releases
+  will use that package name
+
+- **Improvement** Allow for Windows users on *select* versions of Python to
+  use ``--jobs`` and multiprocessing
+
+- **Improvement** Update bounds on McCabe
+
+- **Improvement** Update bounds on PyFlakes and blacklist known broken
+  versions
+
+- **Improvement** Handle new PyFlakes warning with a new error code: F405

docs/source/release-notes/2.6.2.rst

@@ -0,0 +1,4 @@
+2.6.2 - 2016-06-25
+------------------
+
+- **Bug** Fix packaging error during release process.

docs/source/release-notes/index.rst

@@ -7,6 +7,9 @@ with the newest releases first.
 
 .. toctree::
     3.0.0
+    2.6.2
+    2.6.1
+    2.6.0
     2.5.5
     2.5.4
     2.5.3