Nitro Porter 3.1

• Fix avatar locations in Flarum target support.
• Add Spotify embed support for Flarum.
• Add discussion view count support for Flarum.
• Fix performance and other issues importing to blank database for Flarum.
• Fix support for "My media" page in Flarum.
• Fix Kunena source support (thanks to specialworld83)
• Improve feature table to not show 'x' when the feature isn't available.
• Add notes on Flarum and Vanilla feature compatibility.
• Add built-in support pages for Target platform features.