Run beta and nightly in travis, allowing errors
Run beta and nightly in travis, allowing errors

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