made "fixed_is_special_eligible_arg" smarter w.r.t. pairs, and fixed previous unintended behavior because "andalso" ties more tightly than "orelse"
#contributed components
contrib/cvc3-2.2
contrib/e-1.2
contrib/kodkodi-1.2.16
contrib/spass-3.7
contrib/scala-2.8.1.final
contrib/vampire-1.0
contrib/z3-2.15