Tooltips not showing up quick enough, only mouse over

[danielweck]

http://getbootstrap.com/javascript/#tooltips

[danielweck]

@becka11y can you please check whether my proposed implementation is satisfactory? Many thanks!

Feature branch:
https://github.com/readium/readium-js-viewer/tree/feature/tooltips

Pull Request:
#156

[becka11y]

I've tested with VoiceOver in Chrome and Safari and it works fine. Except, there is a typo in library-navbar.html - the Add to library button has the attribute name as arial-label (note the extra letter el). This prevents the button name/label from being spoken by VoiceOver.

[danielweck]

Thanks @becka11y, filed and fixed:
#158

[ryanackley]

I just pushed a fix to develop branch loosely based on Daniel's branch. Let me know if it's not what you had in mind.

[danielweck]

Thanks @ryanackley
I tested the tooltips and it works fine.