Memory Leaking with tooltip

[jgrund]

Consider the following code:

http://embed.plnkr.co/PesubddiiiPCG0Blf0W0/preview

It appears that angular.element.cache size grows as some references are not deleted.

This has been tested on chrome 27.0.1453.93 and firefox 21.0

If the tooltip directive is removed from the span the cache size stays in check.

Still investigating if this is an issue with tooltip or angular.

[jgrund]

So, traced this to remove not being called on tooltip when scopes are destroyed. Will open PR shortly.

[pkozlowski-opensource]

@jgrund awesome!