1. In JavaScriptEngineSwitcher.ConfigurationIntelliSense updated definitions for configuration settings of MSIE and Jint JavaScript engines;
2. In JavaScriptEngineSwitcher.Msie:
2.1. Added support of MSIE JavaScript Engine version 1.5.4;
2.2. In configuration settings of MSIE JavaScript Engine added 2 new properties: `UseEcmaScript5Polyfill` (default `false`) and `UseJson2Library` (default `false`);
3. In JavaScriptEngineSwitcher.V8 added support of Microsoft ClearScript.V8 version 5.4.2.1 (support of V8 version 4.2.77.18);
4. In JavaScriptEngineSwitcher.Jurassic added support of Jurassic version of June 23, 2015;
5. In JavaScriptEngineSwitcher.Jint:
5.1. Added support of Jint version of June 24, 2015;
5.2. In configuration settings of Jint JavaScript Engine added one new property - `AllowDebuggerStatement` (default `false`).