Merge pull request #154 from edx/ned/adding-changelog

Starting the CHANGELOG process.

CHANGELOG.rst

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+Change Log
+----------
+
+These are notable changes in edx-platform.  This is a rolling list of changes,
+in roughly chronological order, most recent first.  Add your entries at or near
+the top.  Include a label indicating the component affected.
+
+
+LMS: Some errors handling Non-ASCII data in XML courses have been fixed.
+
+LMS: Add page-load tracking using segment-io (if SEGMENT_IO_LMS_KEY and
+SEGMENT_IO_LMS feature flag is on)
+
+LMS: Background colors on login, register, and courseware have been corrected
+back to white.
+
+LMS: Accessibility improvements have been made to several courseware and
+navigation elements.
+
+LMS: Small design/presentation changes to login and register views.
+
+LMS: Functionality added to instructor enrollment tab in LMS such that invited
+student can be auto-enrolled in course or when activating if not current
+student.
+
+Blades: Staff debug info is now accessible for Graphical Slider Tool problems.
+
+Blades: For Video Alpha the events ready, play, pause, seek, and speed change
+are logged on the server (in the logs). 
+
+Common: Developers can now have private Django settings files.
+
+Common: Safety code added to prevent anything above the vertical level in the
+course tree from being marked as version='draft'. It will raise an exception if
+the code tries to so mark a node. We need the backtraces to figure out where
+this very infrequent intermittent marking was occurring. It was making courses
+look different in Studio than in LMS.
+
+Deploy: MKTG_URLS is now read from env.json.
+
+Common: Theming makes it possible to change the look of the site, from
+Stanford.
+
+Common: Accessibility UI fixes.
+
+Common: The "duplicate email" error message is more informative.
+
+Studio: Component metadata settings editor.
+
+Studio: Autoplay is disabled (only in Studio).
+
+Studio: Single-click creation for video and discussion components.
+
+Studio: fixed a bad link in the activation page.
+
+LMS: Changed the help button text.
+
+LMS: Fixed failing numeric response (decimal but no trailing digits).
+
+LMS: XML Error module no longer shows students a stack trace.
+
+Blades: Videoalpha.
+
+XModules: Added partial credit for foldit module.
+
+XModules: Added "randomize" XModule to list of XModule types.
+
+XModules: Show errors with full descriptors.
+
+XQueue: Fixed (hopefully) worker crash when the connection to RabbitMQ is
+dropped suddenly.
+
+XQueue: Upload file submissions to a specially named bucket in S3.
+
+Common: Removed request debugger.
+
+Common: Updated Django to version 1.4.5.
+
+Common: Updated CodeJail.
+
+Common: Allow setting of authentication session cookie name.
+