added isnan implementations for vs2012. Don't define isfine() on vs2013, since it is already defined by math.h there.
added isnan implementations for vs2012. Don't define isfine() on vs2013, since it is already defined by math.h there.

sosolimited/Cinder,morbozoo/sonyHeadphones,morbozoo/sonyHeadphones,2666hz/Cinder,2666hz/Cinder,sosolimited/Cinder,sosolimited/Cinder,morbozoo/sonyHeadphones,2666hz/Cinder,sosolimited/Cinder,morbozoo/sonyHeadphones,2666hz/Cinder