[#72093490] add *.gem to gitignore
[#72093490] add *.gem to gitignore

ourcities/acts_as_our_cities,ourcities/acts_as_our_cities,meurio/acts_as_our_cities,meurio/acts_as_our_cities,meurio/acts_as_our_cities,ourcities/acts_as_our_cities