Allow duplicates to be exported

[chriskempson]

I think duplicates in Anki are a good thing. For words that have more than one meaning, I have more than one card. Each card has a different example sentence demonstrating the words multiple uses. Also for words that for some reason just don't stick so well in my mind I'll usually add another example sentence for the same word to help it stick.

If issue #15 is implemented and there is a visual warning for duplicates the user could then decide whether or not he/she would like to add the word to his/her Anki deck.

Currently I get around this by placing an arbitrary character after the word and later deleting it Anki's card browser.

[p2635]

I second this, words have more than one meaning.