Create ComponentInterface

It combines the old IdentInterface with the ParamsInterface, providing an identifier and parameters (if needed).
The main purpose of the change is to make the class hierarchy (as viewed via doxygen) much easier to follow.

src/effects/TimeScale.cpp

@@ -82,9 +82,9 @@ EffectTimeScale::~EffectTimeScale()
 {
 }
 
-// IdentInterface implementation
+// ComponentInterface implementation
 
-IdentInterfaceSymbol EffectTimeScale::GetSymbol()
+ComponentInterfaceSymbol EffectTimeScale::GetSymbol()
 {
    return TIMESCALE_PLUGIN_SYMBOL;
 }