Add doctrine-common and doctrine-dbal
Basic support for Doctrine\DBAL
Use Doctrine for schema changes
Don't test the schema export for now, first decide which format we are going to use
Add MDB2 compatible database schema writer
Remove other database implementations from OC_DB
Merge branch 'master' into doctrine

Conflicts:
	lib/base.php
	lib/db.php
Change to use 3rdparty version
Merge branch 'master' into doctrine

Conflicts:
	lib/base.php
	lib/db.php
Codestyle cleanup
Change PDO Exceptions to Doctrine Exceptions
Remove MDB2 sqlite3 driver
Merge branch 'master' into doctrine

Conflicts:
	lib/db.php
Fix mssql connection parameters and correct driver for pgsql
Merge branch 'master' into doctrine
Point 3rdparty submodule to the doctrine branch
Change var_dumps to exceptions
Use the correct property for connection object
Rewrite query for numRows function for SELECT queries
Fix handling of empty defaults in schema