BUGFIX: Added double quotes to column names in automatically generated indexes for many_many relationships (this time in the right place, should not interfere with index name - all tests pass)
API CHANGE: Added DataQuery::aggregate() to allow for aggregates beyond Min, Max, Avg, Sum.
API CHANGE: Added GridField::addDataFields() to allow the definition of custom callbacks to be used by all GridField components.
API CHANGE: Added GridField::getDataFieldValue() to encapsulate field lookup for all components.
API CHANGE: Allow 'callback' key to be specified in a GridFieldDataColumn column info.  In this case, title should be put as the 'title' key of a map rather than simply the column info.
API CHANGE: Added DataList::filterByCallback() to allow filtering by PHP code.
BUGFIX: Ensure that DataList::filter() doesn't modify the original object.
API CHANGE: Added $value argument as the first argument of a gridfield formattting callback.
ENHANCEMENT: Added the ability to set a cost (the property was protected before and there were no setters and getters) and enforced the php requirements on the cost string used in the salt of crypt. Specifically, two digit from 04-31. Updated unit tests for blowfish algorithm to actually use the salt generation function and to test the newly implemented cost setting and getting functionality.
BUGFIX: Ticket #5578  SiteTree->CanCreateTopLevel() doesn't change dragged tree nodes or ParentID changes
BUGFIX Make sure to only construct args for prototype object creation if
there are actually args passed through to prevent overwriting with null
args if they're passed

MINOR Added __get alias to remove need for explicit ->get() call

MINOR Added the injector instance as an object that can be injected into other classes

BUGFIX Fixed issue described in http://open.silverstripe.org/ticket/7448 whereby using the injector to create an object of a type already registered as a singleton would actually overwrite the stored singleton object
BUGFIX Moved initialisation of injector to the start of Core.php to make sure that it is initialised correctly before additional code blocks reference it (in particular some of the code introduced by Sam that is triggered during add_extension).
MINOR Only set X-Pjax header in redirections if it doesn't already exist in the response
MINOR Hiding CMS-specific badges in TreeDropdownField (fixes #7456)
BUGFIX: Fix thirdparty library jquery-cookie referencing $ outside a closure, which wont work in noConflict mode
API CHANGE: Upgrade jquery entwine
BUGFIX: Use new jQuery.Entwine event capturing, onadd and onremove features to plug some memory leaks
ENHANCEMENT: Make ToggleCompositeField use new entwine features
BUGFIX: TinyMCE isnt unbinding formatselect or styleselect which leaks memory. We should really fix TinyMCE, but lets just brute-force it for now.
ENHANCEMENT: In dev mode, include some basic leak detection functions in the admin panel
MINOR Limiting console.log() output to explicit enabling through window.debug to avoid failing IE
MINOR jQuery UI tabs memory leak (see ##7258)

Events with closed in DOM elements get bound to window on tab initialisation,
and never unbound. Will be fixed with jQuery UI 1.9