5.8.0

• @gkatsev added issue and PR templates for github (view)
• @Nipoto added fa.json (farsi/persian lang file) (view)
• @forbesjo updated travis to use latest firefox (view)
• @Naouak updated time display to not change if values do not change (view)
• @forbesjo updated track settings to not fail restoring settings when localStorage is not available (view)
• @mister-ben Added en.json as localization template (view)
• @misteroneill added alt css as video-js-cdn.css (view)