Better Youtube (former "Youtube Mini Player")

Features:

1. Toggle mini player when scrolling down in Youtube.
2. Video download by using youtubeinmp3.com API.
3. Rebind space key to play/pause when playing videos. No more annoying accident scrolling down.

Update details:

• Video download by using youtubeinmp3.com API.
• Better performance.
• Minor bug fixes.
• The mini player can be toggled on and off by clicking the "Mini: on/off" button on the very top-right corner of Youtube.
• The mini player can be toggled side by side by clicking the button next to playing time in video controls.