Fixed mime type for text only files in dash segmenter (cf #271)
Fixed mime type for text only files in dash segmenter (cf #271)

Bevara/Access-open,vladimir-kazakov/gpac,ARSekkat/gpac,rbouqueau/gpac,emmanouil/gpac,rauf/gpac,rbouqueau/gpac,gpac/gpac,gpac/gpac,porcelijn/gpac,nguyen-viet-thanh-trung/gpac,porcelijn/gpac,rbouqueau/gpac_brew_travis,RodolpheFouquet/gpac,rbouqueau/gpac_brew_travis,ARSekkat/gpac,rbouqueau/gpac,ARSekkat/gpac,nguyen-viet-thanh-trung/gpac,emmanouil/gpac,rbouqueau/gpac,aymanelyaagoubi/gpac,gpac/gpac,Bevara/Access-open,gpac/gpac,aymanelyaagoubi/gpac,nguyen-viet-thanh-trung/gpac,Bevara/Access-open,gpac/gpac,nguyen-viet-thanh-trung/gpac,rbouqueau/gpac_brew_travis,vladimir-kazakov/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,gpac/gpac,rbouqueau/gpac,gpac/gpac,nguyen-viet-thanh-trung/gpac,rbouqueau/gpac_brew_travis,aymanelyaagoubi/gpac,rauf/gpac,gpac/gpac,rbouqueau/gpac,rbouqueau/gpac_brew_travis,ARSekkat/gpac,RodolpheFouquet/gpac,aymanelyaagoubi/gpac,emmanouil/gpac,rauf/gpac,porcelijn/gpac,emmanouil/gpac,Bevara/Access-open,aymanelyaagoubi/gpac,rauf/gpac,nguyen-viet-thanh-trung/gpac,ARSekkat/gpac,porcelijn/gpac,RodolpheFouquet/gpac,vladimir-kazakov/gpac,vladimir-kazakov/gpac,porcelijn/gpac,ARSekkat/gpac,RodolpheFouquet/gpac,rauf/gpac,vladimir-kazakov/gpac,vladimir-kazakov/gpac,RodolpheFouquet/gpac,Bevara/Access-open,rbouqueau/gpac,aymanelyaagoubi/gpac,emmanouil/gpac,emmanouil/gpac,rauf/gpac,rbouqueau/gpac_brew_travis,Bevara/Access-open,porcelijn/gpac