Changes
** Bug
* [PHP-722] - Segfault when passing null value to MongoCollection::find() and unclear other conditions are met, inaccurate error message
* [PHP-796] - Modifying MongoDate internal properties evilness
* [PHP-813] - IS_SCALAR_*() doesn't account for resources
* [PHP-815] - MongoCursor ctor doesn't validate the MongoClient object
* [PHP-833] - Add the MongoClient::killCursor method to kill a cursor on the server on 64-bit platforms
* [PHP-835] - Driver interprets 'err' property as MongoCursorException
* [PHP-848] - Invalid read in master
* [PHP-882] - mongo_connection_get_server_version memleaks
* [PHP-883] - php_mongo_dbref_create() doesn't handle MongoId values
* [PHP-888] - DBRef refactoring broke BC for $id parameter handling
* [PHP-902] - Segfault when unregistering broken server
* [PHP-949] - ensureIndex() creates wrong names
* [PHP-955] - Switch the default mongo.native_long to 1 for 64bit platforms
* [PHP-981] - Empty document should not throw exception
** Improvement
* [PHP-578] - No need to call ismaster 2times
* [PHP-705] - Throw exception when overflowing message size in OP_INSERT batches
* [PHP-708] - WriteConcern failure exception should include the entire GLE document
* [PHP-712] - findAndModify returns empty array when nothing is found
* [PHP-774] - Deprecate the protected method MongoCollection::toIndexString
* [PHP-807] - Rewrite to_index_string to use smart_str and a real C function
* [PHP-812] - Remove unused MongoDBRef::$refKey and MongoDBRef::$idKey
* [PHP-837] - Handle cursor IDs for return with MongoCursor::info on 32bit platforms
* [PHP-851] - Add MONGO_HAVE_* constants and make sure MINFO contains this too
* [PHP-880] - New write operation method for insert, update, remove
* [PHP-886] - Add support for secondaryAcceptableLatencyMS
* [PHP-903] - Improve the Stream Notification API
* [PHP-941] - Throw MongoConnectionException on stream failures
* [PHP-942] - Throw MongoDuplicateKeyException on duplicate key errors
* [PHP-971] - Remove mongo.native_long for 32bit platforms
* [PHP-990] - Implement Batch Write API
** New Feature
* [PHP-819] - Add Mongo[DB|Collection]->[get|set]WriteConcern()
* [PHP-831] - SASL Support (SASL Plain)
* [PHP-832] - SASL Support (SASL Kerberos)
* [PHP-861] - Add maxTimeMS() method to MongoCursor to configure the maximum time a query can take
* [PHP-868] - Method to check if string is a valid ObjectId
* [PHP-873] - Support the MONGODB-X509 authentication mechanism
* [PHP-875] - Add support for cursor for aggregation
* [PHP-876] - Make the driver check for the server version upon connection
* [PHP-923] - Drivers should only talk to servers with overlapping wire versions
* [PHP-944] - Support $out aggregation pipeline operator
* [PHP-951] - Provide API for getting latest server version or isMaster response in driver
* [PHP-962] - Create constants for additional binary data subtypes
* [PHP-965] - Documentation for MongoId::isValid()
** Task
* [PHP-657] - Add deprecation notice to MongoCursor::slaveOkay
* [PHP-714] - Convenience macro for getting mongoclient*
* [PHP-786] - Sort out includes
* [PHP-809] - Deprecate use of "safe" all over collection.c
* [PHP-844] - driver must authenticate before calling isMaster()
* [PHP-845] - Ability to use different SPN on the driver for Kerberos Authentication
* [PHP-983] - Change nUpdated to nMatched in bulk api results
** Sub-task
* [PHP-763] - Create prototypes for MongoClient and Mongo classes
* [PHP-794] - Remove 'fd' property of MongoCursorException
* [PHP-797] - Deprecate public properties
* [PHP-798] - Rename "timeout" to "socketTimeoutMS" in $options
* [PHP-804] - Deprecate Mongo::connectUtil
* [PHP-818] - Deprecate "Mongo" in favour of MongoClient.
* [PHP-824] - Deprecate the "wtimeout" option in crud operations for wTimeoutMS