- Decreased sensitivity and inverted scroll on volume slider (scroll …

…up to increase, down to decrease)

- Fix for undefined buffer error

- Add scroll listener on volume slider (PR sampotts#227 bty @igoradamenko)

Fix for Vimeo fullscreen (fixes sampotts#214)

Default icon prefix `icon` -> `plyr` to avoid clashes

Build changes, sprite.svg => plyr.svg

Fix for bug in v1.6.7

iOS bug fixes

Icon tweaks, IE button fixes

IE fixes

Bug fix for undefined progress bar