Slot bool operator test was added.
	modified:   prototype/Signals-test/src/Test.cpp
	modified:   prototype/Signals/src/signals/Slot.h
Huge bug was found in slot implementation. Now it's fixed. When slot is copied, it keeps all metainformation about its state.
	modified:   prototype/Signals-test/src/Test.cpp
	modified:   prototype/Signals/src/Signals.cpp
	modified:   prototype/Signals/src/signals/Slot.h
	modified:   prototype/Signals/src/signals/TemplateHelpers.h