add initial support for external DI framework
update external DI integration:
* adds @Scope support and thus usage or not of internal cache
* add weld-se tests
* update pom to integrate weld tests, keeping separation with global project
Merge branch 'external-di-support' of git://github.com/McFoggy/afterburner.fx into McFoggy-external-di-support
Merge branch 'McFoggy-external-di-support' into topgun