lib/abaaso.js
function ( obj, arg ) {
		if ( !array.contains( obj, arg ) ) {
			obj.push( arg );
		}

		return obj;
	}
function ( obj, arg ) {
		if ( !array.contains( obj, arg ) ) {
			obj.push( arg );
		}

		return obj;
	}
function ( obj , arg ) { if ( ! array . contains ( obj , arg ) ) { obj . push ( arg ) ; } return obj ; }
Adds 'arg' to 'obj' if it is not found

@method add
@param  {Array} obj Array to receive 'arg'
@param  {Mixed} arg Argument to set in 'obj'
@return {Array}     Array that was queried
Adds arg to obj if it is not found