With the namespacing work, there are a number of classname values that
need to be updated in existing databases.
This change to DatabaseAdmin carries out the remapping as part of
dev/build.
API Introduce HTMLFragment as casting helper for HTMLText with shortcodes disabled
API Introduce DBField::CDATA for XML file value encoding
API RSSFeed now casts from the underlying model rather than by override
API Introduce CustomMethods::getExtraMethodConfig() to allow metadata to be queried
BUG Remove _call hack from VirtualPage
API Remove FormField::$dontEscape
API Introduce HTMLReadonlyField for non-editable readonly HTML
API FormField::Field() now returns string in many cases rather than DBField instance.
API Remove redundant *_val methods from ViewableData
API ViewableData::obj() no longer has a $forceReturnObject parameter as it always returns an object
BUG Fix issue with ViewableData caching incorrect field values after being modified.
API Remove deprecated DB class methods
API Enforce plain text left/right formfield titles
BUG Fix incorrect method visibility on SS_Database
BUG Fix obvious PHPDoc errors in SilverStripe\ORM\FieldType
BUG Fix incorrect case on some method invocations
API Remove some deprecated code