add note that memory is 1024 based

src/views/graphs.js

@@ -17,6 +17,7 @@ angular.module('Application').controller('GraphsController', ['$scope', '$locati
 
     $scope.installedApps = Client.getInstalledApps();
 
+    // we use 1024 to match free -m output (which is not si units)
     function bytesToMegaBytes(value) {
         return (value/1024/1024).toFixed(2);
     }