#1181 DOI Handling in ArXiv/OAI2 import

[w__b]

I think because arXiv can have a DOI identifier set when authors publish, it would be nice to import that as well.

My guess is that it is a simple modification in
src/java/net/sf/jabref/imports/OAI2Handler.java

Around line 76 add something like:
} else if (qualifiedName.equals("doi")) {

followed by the necessary entry.setField for doi in Bibtex.