Changes
** Bug
* [PHP-995] - JSON detection
* [PHP-996] - Broken with cyrus-sals 2.1.23
* [PHP-999] - Inline mapReduce command ignores read preferences
* [PHP-1000] - RP support for "mapReduce" command, not just "mapreduce"
** Improvement
* [PHP-998] - Include maxWriteBatchSize and maxMessageSizeBytes in connection info
** Task
* [PHP-407] - MongoBinData should default to type 0 instead of 2
* [PHP-960] - Use createIndexes command when available
* [PHP-987] - Use maxWriteBatchSize from ismaster for write command batch splitting.
** Sub-task
* [PHP-993] - Merge batch return values into one return value