travis: run cargo fmt on subcrates as well
travis: run cargo fmt on subcrates as well

tsurai/cargo,tshepang/cargo,rustyhorde/cargo,vojtechkral/cargo,nipunn1313/cargo,tsurai/cargo,tsurai/cargo,rustyhorde/cargo,rustyhorde/cargo,rust-lang/cargo,rust-lang/cargo,tsurai/cargo,eminence/cargo,tshepang/cargo,vojtechkral/cargo,nipunn1313/cargo,nipunn1313/cargo,tsurai/cargo,nipunn1313/cargo,vojtechkral/cargo,rust-lang/cargo,rustyhorde/cargo,tshepang/cargo,eminence/cargo,vojtechkral/cargo,rust-lang/cargo,eminence/cargo,eminence/cargo,tshepang/cargo