Add Doctrine DBAL and dependencies
Backport of Doctrine Sqlite ALTER TABLE workaround
Merge branch 'master' into doctrine
Merge branch 'master' into doctrine
Remove old Google Drive libs
Update Doctrine DBAL to 2.3.4
Backport of Doctrine Sqlite ALTER TABLE workaround

Conflicts:
	doctrine/dbal/lib/Doctrine/DBAL/Schema/Comparator.php
	doctrine/dbal/lib/Doctrine/DBAL/Schema/SqliteSchemaManager.php
Don't add 'NOT NULL' to the 'ALTER TABLE' when that hasn't changed
Fix quoting of identifiers in OraclePlatform
Merge branch 'master' into doctrine
Merge branch 'master' into doctrine
Add primary key to 'ALTER TABLE' in MySql
When changing from a non-primary index to a primary index, the dropped index isnt named PRIMARY
Use quoted column name for alter table
Dropped indexes can have constraints, drop those first if they exist
Merge pull request #17 from owncloud/doctrine

OC6: Add Doctrine
Merge pull request #29 from owncloud/googledrive

Remove old Google Drive libs
Merge branch 'master' into oc_preview