Updates README to show what we've implemented.
Updates README to show what we've implemented.

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