persist:true doesn't survive force reload

which is obvious
but then how to allow user to force reload?

so maybe you could add additional property which could mark that such css is general one
and has to be available for all pages
something like

``` javascript
{
href: 'myGeneralCssFile.css',
global: true
}
```

this will of course overwrite persist property and should probably also overwrite preload as well
EDIT:
just to explain - it would be useful for example for other libs css files
ie:
font-awesome