Onion Routing on Interledger

This is a naive implementation of onion routing over the STREAM protocol for Interledger.

TODOs

• Get base layer STREAM running
• Combine server and client into one monolithic client
• Write onion interactions on top of STREAM
• Write ILP interactions on top of STREAM
• Merge with ilp-connector/SPSP server (use real shared secrets and full protocol)