Script: Prototypes for CreateEffect should inherit from Effect

This makes the special effect properties useable without the "this." prefix,
makes the various useful global functions available as well as
effect-specific functions.

docs/sdk/script/Effects.xml

@@ -70,8 +70,7 @@ func Activate(object caster, object caster2)
 	return true;
 }
 
-local InvisPSpell =
-{
+local InvisPSpell = new Effect {
 	Start = func() {
 		// Save the casters previous visibility
 		this.visibility = Target.Visibility;
@@ -113,7 +112,7 @@ func Activate(object caster, object caster2)
 	return true;
 }
 
-local BanBurnPSpell = {
+local BanBurnPSpell = new Effect {
 	Construction = func()
 	{
 		// On start of the effect: extinguish clonk
@@ -217,7 +216,7 @@ func Activate(object caster, object caster2)
 	return true;
 }
 
-local ReincarnationPSpell = {
+local ReincarnationPSpell = new Effect {
 	Construction = func() {
 		// Only at the first start: message
 		Target-&gt;<funclink>Message</funclink>(&quot;%s gets an extra life&quot;, Target-&gt;<funclink>GetName</funclink>());

planet/System.ocg/Action.c

@@ -1,7 +1,7 @@
 /*--
 		Action.c
-		Authors: Günther
-		
+		Authors: Günther
+
 		Stuff for the proplist changes.
 --*/
 

planet/System.ocg/Effect.c

@@ -0,0 +1,19 @@
+/*--
+		Effect.c
+		Authors: Günther
+
+		Prototype for effect prototypes.
+--*/
+
+static const Effect = new Global {
+	Remove = func(bool no_calls) {
+		return RemoveEffect(nil, nil, this, no_calls);
+	},
+	// These properties are set on all effects by the engine.
+	// They are declared here so that functions on proplists inheriting from this one can use them easily.
+	Name = nil,
+	Priority = 0,
+	Interval = 0,
+	Target = nil,
+	Time = 0
+};