Renamed InjectorListener to InjectorLifecycleListener
Implemented InjectorListener and InjectorListenerWhiteboard.
Use empty HashTable as initial properties for the registered bridge.
Added `initialized` flag to the component example in InjectorListener javadocs.
Merge pull request #61 from Cognifide/SLICE-93

Slice 93 - created InjectorListener as a part of the API