PHP-990: Add a MongoWriteBatch for the Batch Write API
PHP-990: Add support for UPDATE and DELETE in the Batch API
CS
MongoWriteInsertBatch & MongoWriteUpdateBatch tests
PHP-990: Add MongoInsertBatch extending MongoWriteBatch
PHP-990: Addeded MongoUpdateBatch and MongoDeleteBatch extending MongoWriteBatch
Fix zts build
PHP-990: Make Batch classes only available on 5.3.0+
Add support for the "global" (server) options & write concerns
Merge pull request #589 from bjori/PHP-990-bulk-api

PHP-990: MongoWriteBatch API

* bjori/PHP-990-bulk-api:
  Add support for the "global" (server) options & write concerns
  PHP-990: Make Batch classes only available on 5.3.0+
  Fix zts build
  PHP-990: Addeded MongoUpdateBatch and MongoDeleteBatch extending MongoWriteBatch
  PHP-990: Add MongoInsertBatch extending MongoWriteBatch
  MongoWriteInsertBatch & MongoWriteUpdateBatch tests
  CS
  PHP-990: Add support for UPDATE and DELETE in the Batch API
  PHP-990: Add a MongoWriteBatch for the Batch Write API