/*!
压缩文件
@replace 	{object} 	replace 的配置文
@dest 		{string} 	保存的目标地址
return  	{string}
function( replace , dest ){
		var _urls = [];
		for( var i = replace.js.length; i--; ){
			_urls.push( config.dir.src_dir + replace.js[ i ] );
		};
		try{
			grunt.file.write( dest , minjs.minify( _urls ).code.toString() );	
		} catch( e ){
			E( "Error : uglifyJS error. check js files " + _urls.join( " ; " ) );
		}
	}