API New Database abstraction layer. Ticket #7429
Database abstraction broken up into controller, connector, query builder, and schema manager, each independently configurable via YAML / Injector
Creation of new DBQueryGenerator for database specific generation of SQL
Support for parameterised queries, move of code base to use these over escaped conditions
Refactor of SQLQuery into separate query classes for each of INSERT UPDATE DELETE and SELECT
Support for PDO
Installation process upgraded to use new ORM
SS_DatabaseException created to handle database errors, maintaining details of raw sql and parameter details for user code designed interested in that data.
Renamed DB static methods to conform correctly to naming conventions (e.g. DB::getConn -> DB::get_conn)
3.2 upgrade docs
Performance Optimisation and simplification of code to use more concise API
API Ability for database adapters to register extensions to ConfigureFromEnv.php
Merge pull request #1360 from tractorcow/3.2-pdo-connector

API New Parameterised Database ORM for Silverstripe 3.2. Ticket #7429
FIX: Hierarchy markOpened incorrectly applying

Moved call to markingClasses() to after resolution of the nodes children has
happened. This fixes the jstree-open applying before the tree has been checked.