first commit -> move some files from one-api

vendor/mongodb/mongodb/README.md

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+MongoDB library for PHP
+=======================
+
+This library provides a high-level abstraction around the lower-level drivers for
+[PHP](https://github.com/mongodb/mongo-php-driver) and
+[HHVM](https://github.com/mongodb/mongo-hhvm-driver) (i.e. the `mongodb`
+extension).
+
+While the extension provides a limited API for executing commands, queries, and
+write operations, this library implements an API similar to that of the
+[legacy PHP driver](http://php.net/manual/en/book.mongo.php). It contains
+abstractions for client, database, and collection objects, and provides methods
+for CRUD operations and common commands (e.g. index and collection management).
+
+If you are developing an application with MongoDB, you should consider using
+this library, or another high-level abstraction, instead of the extension alone.
+
+For further information about the architecture of this library and the `mongodb`
+extension, see:
+
+ - http://www.mongodb.com/blog/post/call-feedback-new-php-and-hhvm-drivers
+
+## Documentation
+
+ - https://docs.mongodb.com/php-library/
+
+# Installation
+
+As a high-level abstraction for the driver, this library naturally requires that
+the [`mongodb` extension be installed](http://php.net/manual/en/mongodb.installation.php):
+
+    $ pecl install mongodb
+    $ echo "extension=mongodb.so" >> `php --ini | grep "Loaded Configuration" | sed -e "s|.*:\s*||"`
+
+The preferred method of installing this library is with
+[Composer](https://getcomposer.org/) by running the following from your project
+root:
+
+    $ composer require mongodb/mongodb
+
+## Reporting Issues
+
+Please use the following form to report any issues:
+
+ - https://jira.mongodb.org/secure/CreateIssue.jspa?pid=12483&issuetype=1