JBIDE-15302 CordovaSim: Adding cordova plugin support
JBIDE-15302 CordovaSim: Adding caching via Etag for CordovaPluginJsServlet. Refactoring.
JBIDE-15302 CordovaSim: Adding caching via Etag for PluginServlet.
JBIDE-15302 CordovaSim: Refactoring. Adding cordova-3.1.0 support