Creates a deep copy of current node
@returns {AbbreviationNode}
function() {
			var node = new AbbreviationNode();
			var attrs = ['abbreviation', 'counter', '_name', '_text', 'repeatCount', 'hasImplicitRepeat', 'start', 'end', 'content', 'padding'];
			_.each(attrs, function(a) {
				node[a] = this[a];
			}, this);
			
			// clone attributes
			node._attributes = _.map(this._attributes, function(attr) {
				return _.clone(attr);
			});
			
			node._data = _.clone(this._data);
			
			// clone children
			node.children = _.map(this.children, function(child) {
				child = child.clone();
				child.parent = node;
				return child;
			});
			
			return node;
		}