Updated to v4.6.4
Updated to version 4.7.0 of video.js
Updated to video.js v4.7.1
Update "Downloads" to "Download" in navigation

Closes #14
Merge pull request #15 from jackjennings/master

Update "Downloads" to "Download" in navigation
Updated to version 4.7.2
Updated to vjs v4.7.3
Updated to video.js v4.8.0