Include JSON file with downloaded icons.
Greetings & thanks for your awesome icons. 

I'd like to request a feature to include a JSON map file along with the downloads, and the ability to import that file to have the icons per-selected. Similar to how its done at: [ihttps://icomoon.io/app/#/select](https://icomoon.io/app/#/select)

Use case: I have 100+ remixicons in my current project, and now I want to add a few more. If I go back to your site, I need to click/add every icon individually I had previously plus the new ones I want. That's 100+ new clicks, not to mention I need to read my css file to find what I already had. A JSON impor/export would solve this issue. 

I'm stuck on your site for the past to weeks out of fear I will lose my current list. 

Cheers

**Edit:** Well, I feel really stupid now. It appears you can already do this by importing/exporting the .remixicon file. In this case I would only suggest to highlight or make active the imported icons.

Please close the issue.
