Fix html() set in IE

[emhagman]

There is an issue here: #3050.
This commit should fix the IE8 issue.

IE doesn't like using innerHTML as seen here:
http://msdn.microsoft.com/en-us/library/ms532998%28v=vs.85%29.aspx#TOM_Create

[tonatiuh]

Nice, I hope it works, and if it does then that it be merged soon to master.

[pkozlowski-opensource]

PR Checklist (Minor Bugfix)

• Contributor signed CLA now or in the past (if you just signed, leave a comment here with your real name)
• PR doesn't introduce new api
• PR doesn't contain a breaking change
• PR contains unit tests
• PR contains e2e tests (if suitable)
• PR contains documentation update (if suitable)
• PR passes all tests on Travis (sanity)
• PR passes all tests on ci.angularjs.org (cross-browser compatibility)
• PR is rebased against recent master
• PR is squashed into one commit per logical change
• PR's commit messages are descriptive and allows us to autogenerate release notes (required commit message format)
• All changes requested in review have been implemented

[pkozlowski-opensource]

@emhagman Thank you for this PR.

We will need a unit-test that demonstrates the issue before this change can be merged. I've also included a checklist for you so you can see which items are mandatory to follow according to the http://docs.angularjs.org/misc/contribute

[petebacondarwin]

@emhagman - can you make sure you sign the CLA please? Thanks

[petebacondarwin]

We need to empty the element first

[ksheedlo]

Hi there! Thanks for the PR.

Unfortunately, we're not going to be able to merge it. element.appendChild needs to work on DOM nodes, not strings. Further, custom elements are so broken in IE8 that you should really avoid them if you want to support IE8 properly. We don't want to encourage broken behavior and there's not a reliable way we've found to get this to work.