Added InjectorFactory to help integrating applications use Mycila, Governator etc.
Updated GuiceBundle constructor to save Stage variable
Added lifecycle management to Guice Injector
Merge with @anismiles commit '082e9c681377519b4fa19ade1849bdab76b80e65'

Conflicts:
	src/main/java/com/hubspot/dropwizard/guice/GuiceBundle.java