Cardano Updates

removed Shelley references

responding to feedback

I think this is more correct: other package that depend on the system
odbc package may not need freetds, the problem is that the Haskell odbc
package doesn't declare its dependency on freetds.

Completed Figures 1, 2, 3, 4, 5, 6, 7, 8 and 12.

* Minimal support for hw wallets (witness pool transactions)
* Supports witnessing with stake or payment keys

* supports hardware wallets and mnemonics
* supports importing account keys
* supports signing transaction with payment or payment and stake key