* Migrate from ring to ed25519-dalek
* Move gen_keypair_file test to a more appropriate location
* Fixup bench-exchange and add helper fn for single deterministic keypair
* Update golden
* move core tests to core
* remove window
* fix up flaky tests
* test_entryfication needs a singly-threaded banking_stage
* move core benches to core
* remove unnecessary dependencies
* remove core as a member for now, test it like runtime
* stop running tests twice
* remove duplicate runs of tests in perf