Cardano Updates

* wallet.icon property added
* wallet properties have APIError removed as they are not functions
* added comments-URI
* clarified limitation on pagination
* removed events API (to be added later) so we can merge this
* APIErrorCode.AccountChange added to make up for lack of events API
* clarify the ability for other networks besides 0/1 on `api.getNetworkId()`
* link to nami-wallet implementation

Co-authored-by: Rhys Bartels-Waller <[email protected]>

Fixed typo

Adding CIP-0010 Registry update to CIP-0027 Pull request

Added header, and moved file under its own folder.

* CIP-0003: Fix Ledger algorithm and one wrong test vector

There was a typo in the pseudo code.

The second test vector has an incorrect output, the other two are
correct.

One can verify the test vectors by modifying this line and running the
script:

https://github.com/LedgerHQ/orakolo/blob/0b2d5e669ec61df9a824df9fa1a363060116b490/src/python/orakolo/HDEd25519.py#L467

* CIP-0003: link to a reference implementation by Ledger