Fix Versioned::augmentSQL() when the data query was null.
formHtmlContent() uses missing FormEncType() call

it needs to call $this->getEncType() instead..
FIX UploadField validation error and styles

UploadField now return the validator's error message instead of 403. Plus nicer layout for error messages.
Allow GridFields without titles to be found.
Update install.php5

Defaulting to MySQL here is really dumb. There is an explicit type as an argument so falling back to mysql could result in "I couldn't write to path ....db" despite the real error that the include of the sqlite3/code/SQLiteDatabaseConfigurationHelper.php failed for some reason.

Other uses of getDatabaseConfigurationHelper also need a similar error handler.
FIX Overriding of theme templates in project folder

Fixes issue of templates not being found when a Page's main/Layout templates are split between the project and theme folders. Adds more expansive testing for template loading.
BUG Ensure TreeMultiSelectField doesn't populate menus with "unchanged".
TreeMultiSelectField's default for its value property is 'unchanged'
which causes menus to not load and generates console errors. Fixes #2795
BUG: #2503 Fixes performReadonlyTransformation for OptionSetField

NEW: Adding unit test for performReadonlyTransformation #nd fixing OptionSetField #2503

BUG: Fixing undefined variables and function parameters for PerformReadonlyTransformation unit tests

NEW: Adding unit test to OptionsetField for read only fields
FIX: Ensure valid CSS classes for GridField header (fixes #2361)
BUG Fix case where setFolder('/') would break UploadField::fileexists
BUG Prevent Upload from writing to the site root folder
BUG Prevent unnecessary reconstruction of ClassName field after default records are generated
BUG Fix DataObject::loadLazyFields discarding original query parameters
BUG Fix Versioned::writeToStage failing to write object with unchanged fields
updating comments for HTTPRequest - immutability

SS_HTTPRequest can be read like an array, e.g. echo $request['a'], but cannot be written like an array, e.g. $request['a'] = 5; Added comment to caution people.

See line 375:
==================================================================
	/**
	 * @ignore
	 */
	public function offsetSet($offset, $value) {}
	
	/**
	 * @ignore
	 */
	public function offsetUnset($offset) {}
==================================================================

Might be good to write something about how you are supposed to modify a request, or what you are supposed to do instead (a redirect?).
Updated find_or_make() documentation 

See: https://github.com/silverstripe/silverstripe-framework/pull/2903#issuecomment-37252948
Minor fix for note about lack of news-file icon

Minor fix for note about the lack of a news-file icon to improve clarity.
Correct backend name so that Zend_Cache can find it

Closes #1425
Handle special characters in error messages when html_errors is Off

Fixes #1538
ENHANCEMENT: Allow nested grouping of GroupedList
Merge pull request #2344 from colymba/uploadfield-upload-validation

FIX UploadField server validation error display
Merge pull request #2482 from ajshort/pull-2

Fix Versioned::augmentSQL() when the data query was null.