Fix IE regex literal to handle IE 10.

* Uses the regex recommended at https://blogs.msdn.com/b/ie/archive/2011/04/15/the-ie10-user-agent-string.aspx

Change-Id: If2f14f072623495f68f29e1dfa058dfb158863ac
Merge pull request #92 from mattflaschen/pull_request_ie_user_agent

Fix IE regex literal to handle IE 10.