update v1.0.7.9 R.C.

This is a Release Candidate. We are still testing.

vendor/zendframework/zend-json/doc/book/zend.json.introduction.md

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+# Introduction
+
+`Zend\Json` provides convenience methods for serializing native *PHP* to *JSON* and decoding *JSON*
+to native *PHP*. For more information on *JSON*, [visit the JSON project
+site](http://www.json.org/).
+
+*JSON*, JavaScript Object Notation, can be used for data interchange between JavaScript and other
+languages. Since *JSON* can be directly evaluated by JavaScript, it is a more efficient and
+lightweight format than *XML* for exchanging data with JavaScript clients.
+
+In addition, `Zend\Json` provides a useful way to convert any arbitrary *XML* formatted string into
+a *JSON* formatted string. This built-in feature will enable *PHP* developers to transform the
+enterprise data encoded in *XML* format into *JSON* format before sending it to browser-based Ajax
+client applications. It provides an easy way to do dynamic data conversion on the server-side code
+thereby avoiding unnecessary *XML* parsing in the browser-side applications. It offers a nice
+utility function that results in easier application-specific data processing techniques.