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 ;)
According to http://msdn.microsoft.com/en-au/library/ie/ff974344%28v=vs.85%29.aspx the property exists... I'm assuming you mean it's not populated? Would be worthwhile to clarify the comment if this is the case :baby_chick: