^not sure where youre getting that from, i just spent 15 min going through every single material and they are set to 'use gamma from render settings'.  you may have changed it yourself and not noticed?

 

what i did notice is that the eyelashes dont have gamma set to 1.0 -- so if you end up with sparse lashes while using gamma correction youll need to change the map in 6_Eyelash to use custom gamma value of 1.0. ill mark that for fixing in the next update.