Small fixes for IE10

Wodo.TextEditor does still not completely work after this, but at least better then before.
Also makes ViewerJS in IE properly display ODT with annotations.

Any IE lovers around to continue this work? I somehow feel unmotivated for more ;)
Ah, I remember that :-/. If you're interested, a comment in their docs about this: http://msdn.microsoft.com/en-us/library/ie/aa703876%28v=vs.85%29.aspx

> The event object is only available during an event; that is, you can use it in event handlers but not in other code.