ENGINES: Unify engine names

This unifies the engine names in MetaEngine::getName() and the
credits. In particular drop "Engine" or "engine" from the names when
it was present and use expanded names in credits when the
MetaEngine uses it (e.g. "Beneath a Steel Sky" instead of "BASS").

engines/draci/detection.cpp

@@ -113,7 +113,7 @@ public:
 	DraciMetaEngine() : AdvancedMetaEngine(detectionParams) {}
 
 	virtual const char *getName() const {
-		return "Draci Historie Engine";
+		return "Draci Historie";
 	}
 
 	virtual const char *getOriginalCopyright() const {