Add missing MongoClient constructor changelog entries

Includes various other small grammar and language changes.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@333377 c90b9560-bf6c-de11-be94-00142212c4b1
Revise MongoCollection write options and add missing changelog entries

https://jira.mongodb.org/browse/PHP-1076


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@333378 c90b9560-bf6c-de11-be94-00142212c4b1