v2.1.0.0

Change log

1. New features:

   1. Navigate directly to the JSON node in the editor upon node selection (using left mouse click or arrow keys).
   2. Select the JSON key in the editor when double-clicking on a node.

2. Bug/regression fixes:

   1. Updated to the latest RapidJSON parser.
   2. Minor code enhancements for improved performance.
   3. Added unit tests

Full Changelog: v2.0.8.0...v2.1.0.0