changes of last 2 weeks (massive refactoring of techtree services, entities and tables goes on); Important: NEW db schema and data dumps added!
delete deprecated db schema and data dumps
entity refactoring for techtree complete
refactoring: trade technologies changed to trade researches due to techtree entity refactoring
added jquery plugin bootstrap-growl, update db schema/data sql, polished create/delete function for trade offers
solved merge conflicts