Switch travis-ci from xctool to xcpretty.
Switch travis-ci from xctool to xcpretty.

jmoody/FontAwesomeIconFactory,AmitaiB/FontAwesomeIconFactory,AmitaiB/FontAwesomeIconFactory,nschum/FontAwesomeIconFactory,paulz/FontAwesomeIconFactory,nschum/FontAwesomeIconFactory,AmitaiB/FontAwesomeIconFactory,jmoody/FontAwesomeIconFactory,jmoody/FontAwesomeIconFactory,nschum/FontAwesomeIconFactory,nschum/FontAwesomeIconFactory,paulz/FontAwesomeIconFactory,jmoody/FontAwesomeIconFactory,paulz/FontAwesomeIconFactory,AmitaiB/FontAwesomeIconFactory,paulz/FontAwesomeIconFactory