Release 0.0.1 of ibc-rs (cosmos#120)

* Added CHANGELOG.md

* Apply suggestions from code review

Co-authored-by: Adi Seredinschi <adi@informal.systems>

* update changes

Co-authored-by: Ethan Buchman <ethan@coinculture.info>
Co-authored-by: Adi Seredinschi <adi@informal.systems>

CHANGELOG.md

@@ -0,0 +1,18 @@
+## [0.0.1]
+
+*July 1st, 2020*
+
+This is the initial prototype release of an IBC relayer and TLA+ specifications.
+There are no compatibility guarantees until v0.1.0.
+
+Includes:
+
+- Configuration file definition and validation
+- Client state, consensus state, connection, channel queries.
+    - Note: deserialization is unimplemented as it has dependency on migration to protobuf for ABCI queries
+- Per chain light clients threads are created and headers are periodically retrieved and verified.
+- Per chain IBC event monitor threads are spawned and main event handler that receives them.
+    - Note: the event handler just displays the events.
+- IBC Modules partial implementation for datastructures, messages and queries.
+- Some English and TLA+ specifications for Connection & Channel Handshake as well as naive relayer algorithm.
+