JSON Utility - Release Notes

2.7.0
    * No changes

2.8.0
    * Refactored to be ECMA 5 spec compliant.  This resulted in the following:
        * Leverages browser native JSON parse and stringify if present
        * Added JSON.useNativeParse and JSON.useNativeStringify boolean configs to
          allow implementers to force the use of the JavaScript implementation.
          These are defaulted to true when the current browser supports native
          JSON.  It is currently recommended to set useNativeStringify to false if
          you need to use a replacer function.
        * Removed object key sorting (per spec)
        * Stringifying cyclical objects will now throw an error (per spec)
        * Removed support for depth control (per spec)
    * Tightened up JSON.stringToDate
    * Renamed final regex _INVALID => _UNSAFE because the destructive regex
      process is to detect unsafe input.  It does not validate against JSON
      syntax.
    * Refactored stringify to match the implementation in YUI 3.

2.7.0
    * No changes

2.6.0
    * Security updates
    * Architecture change to make lang.JSON object more durable
    * stringify whitelist keys scrubbed for duplicates
    * Object keys sorted in stringify

2.5.1
    * Updated validation regex to address poor unicode escape treatment in FF
    * Updated special characters RegExp
    * Changed stringification to account for odd responses to typeof

2.5.0
    * Restructured for customization and readability
    * Extracted isValid method to test a JSON string
    * Extracted dateToString method to allow overriding with custom serialization format
    * Added stringToDate method to reconstitute Date instances from default JSON UTC date strings.  Use this in a filter method passed to lang.JSON.parse
    * fixed walk method so filters are properly applied

2.4.0
    * Initial release
