Recent InsetCitation Stuff

[rgheck]

I recently committed some "improvements" to InsetCitation, designed to 
display things like:
   G\"odel
using the corresponding unicode. It has now occurred to me, though, that 
this can cause problems with searching, since one will now need to 
search not for G\"odel but for something else. I'm not sure what to do 
about this, but I'm inclined to think I may need to revert this and redo 
it in such a way that it won't affect search. Does this seem right?

Richard