docs: function (err) {
  		        //if any error happened in the previous tasks, exit with a code > 0
  		        if (err) {
  			        var exitCode = 2;
  			        console.log('[ERROR] gulp build task failed', err);
  			        console.log('[FAIL] gulp build task failed - exiting with code ' + exitCode);
  			        return process.exit(exitCode);
  		        }
  		        else {
  			        return callback();
  		        }
  	        }