Saving & loading of Cordapps with DemoBench profiles.
* CORPRIV-664: Implement saving/loading of Cordapps with profiles.
* CORPRIV-664: Refactor saving/loading plugins.
* CORPRIV-664: Add initial unit tests for model.
* CORPRIV-664: Add simple unit tests for NodeController.
* CORPRIV-664: Unit test enhancements, e.g. configure JUL properly.
* CORPRIV-664: Use Suite instead of abstract test class.
* CORPRIV-664: Allow Cordapps to be loaded when each Node is configured.
* CORPRIV-664: Document which checked Java exceptions are thrown.
* Write JavaPackager output into build/javapackage directory.
* CORPRIV-664: Document more checked Java exceptions.
* Refactor Web and Explorer classes into their own packages.
* Declare WebServer and Explorer constructors as "internal".
* Update packaging scripts: tell user where the installer is!
* CORPRIV-659: Set "system menu bar" property for MacOSX.
* CORPRIV-661: Use "*.profile" for profile files.
* Remove unnecessary <children/> elements, as they are defaults.
* Fix build breakage when on Windows.
* Tweaks for EXE packaging script.
* Change function to extension function.
* Code review fixes.
Approved-by: Clinton Alexander
