Major changes:
- Replaces the binary merkle tree used for note commitments with a tiered quadtree (#840), which in the future will allow dramatic improvements to the performance of client synchronization (right now we are not yet taking advantage of its fast-forward sync capabilities; this speedup will come in a later update)
- Adds support for IBC channels (#801)
- Adds new commands to
pclifor printing information about the chain parameters and summary info (#835) - Adds an initial custody protocol (#846)