JBIDE-17099 Support for running 64bit simulators

IOSSimulator can now handle the 64bit flag. We ha also introduced a new
UI field on the launch configuration to ask for a 64 bit simulator.
JBIDE-16931 CordovaSim: Moving CordovaSim's jetty server to the cordovasim.eclipse plugin
JBIDE-16931 CordovaSim: Adding eclipse's linked folder support. Clean up in the vpe.cordovasim plugin. Refactoring
JBIDE-16931 CordovaSim: Changing the way of switching web engine