git: ignore KDevelop4 project files
BibRank: missing selfcites for collaborations

* This fixes a bug that only occurs when not using bibauthorid and computing
  selfcites. We wouldn't collect enough authors for papers that were written
  by collaborations which means that we would never look at the collaboration
  name when computing self cites.

Signed-off-by: Alessio Deiana <alessio.deiana@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>