Added message framework

lib/list.js

@@ -1,20 +1,32 @@
-exports.List = function( discriminator ) {
+exports.List = function( discriminator, cap ) {
 	this.discriminator = discriminator;
+	this.cap = cap || Number.MAX_SAFE_INTEGER;
 	this.contents = [];
 }
 
 exports.List.prototype.add = function( child ) {
+
+	var self = this;
+
 	if ( child.constructor === Array ) {
 
 		children = child;
 		for ( child of children ) {
-			if ( this.filter( this.discriminator, child[ this.discriminator ] ).length === 0 )
-				this.contents.push( child );
+			addChild(child);
 		}
 
 	} else {
-		if ( this.filter( this.discriminator, child[ this.discriminator ] ).length === 0 )
-			this.contents.push( child );
+		addChild(child);
+	}
+
+	function addChild(child){
+
+		if(self.length() > cap){
+			self.splice(0, 1);
+		}
+
+		if ( self.filter( self.discriminator, child[ self.discriminator ] ).length === 0 )
+			self.contents.push( child );
 	}
 }