Makes Travis build all crate features.
Makes Travis build all crate features.

indiv0/rusoto,mattico/rusoto,SecurityInsanity/rusoto,DualSpark/rust-aws,rusoto/rusoto,DualSpark/rust-aws,mattico/rusoto,DualSpark/rusoto,cmsd2/rusoto,ford-prefect/rusoto,mthjones/rusoto,DualSpark/rusoto,rusoto/rusoto,mthjones/rusoto,rusoto/rusoto,DualSpark/rust-aws,mattico/rusoto,noggleboggle/rusoto,SecurityInsanity/rusoto,ford-prefect/rusoto,DualSpark/rusoto