chore(jqLite): implement the detach method

[jbruni]

We at Angular UI are missing jQuery's detach:

angular-ui/bootstrap#1403 (comment)

https://github.com/angular-ui/bootstrap/pull/1391/files#diff-e8665eb306ddd26399e5b80f00dae5bbR252

Thanks.

[IgorMinar]

I'm sorry, but I wasn't able to verify your CLA signature. CLA signature is required for any code contributions to AngularJS.

Please sign our CLA and ensure that the CLA signature email address and the email address in this PR's commits match.

If you signed the CLA as a corporation, please let me know the company's name.

Thanks a bunch!

PS: If you signed the CLA in the past then most likely the email addresses don't match. Please sign the CLA again or update the email address in the commit of this PR.
PS2: If you are a Googler, please sign the CLA as well to simplify the CLA verification process.

[jbruni]

Great. I've read the contribution guidelines now... I will sign the CLA, fix the commit message, and do other stuff I've missed... and then create a new PR for this. Thanks!

[jbruni]

Done at PR 5461