chore: re-organize Cargo.toml feature list
chore: re-organize Cargo.toml feature list

Re-organize Cargo.toml feature list to be in alphabetic order.

Closes #456.

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