[#44] Provide a spi to allow framework to remove all suppliers for a given type:
 - add a new interface
 - add new tests
Merge branch 'master' into yar-44
#44: make the tests work again
Merge branch 'master' into yar-44

Conflicts:
	yar-guice/src/main/java/org/javabits/yar/guice/SimpleRegistry.java
[#44] make everything works again after merge from master
[#44] provide a hook to listen to type appear and disappear from the registry.
Merge branch 'yar-44'

Conflicts:
	yar-guice-osgi/src/main/java/org/javabits/yar/guice/osgi/internal/Activator.java
[#44] merge from remote
[#44] clean un necessary call