Add release notes for 4.5.0.

Author: GrahamDumpleton

docs/release-notes.rst

@@ -5,6 +5,8 @@ Release Notes
 .. toctree::
    :maxdepth: 2
 
+   release-notes/version-4.5.0
+
    release-notes/version-4.4.23
    release-notes/version-4.4.22
    release-notes/version-4.4.21

docs/release-notes/version-4.5.0.rst

@@ -0,0 +1,16 @@
+=============
+Version 4.5.0
+=============
+
+Version 4.5.0 of mod_wsgi can be obtained from:
+
+  https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.0
+
+New Features
+------------
+
+1. Added additional internal performance monitoring features, included per
+   request event mechanism for getting extended metrics on a per request
+   basis. This includes details like per request CPU burn, which along with
+   process level CPU burn and thread utilisation can be used to better tune
+   processes/threads settings.