Add changelog
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..86cf3ae
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+# 0.4.0 (July 16)
+
+* [BUGFIX] EventLoop::register requests all events, not just readable.
+* [BUGFIX] Attempting to send a message to a shutdown event loop fails correctly.
+* [FEATURE] Expose TCP shutdown
+* [IMPROVEMENT] Coalesce readable & writable into `ready` event (#184)
+* [IMPROVEMENT] Rename TryRead & TryWrite function names to avoid conflict with std.
+* [IMPROVEMENT] Provide TCP and UDP types in mio (path to windows #155)
+* [IMPROVEMENT] Use clock_ticks crate instead of time (path to windows #155)
+* [IMPROVEMENT] Move unix specific features into mio::unix module
+* [IMPROVEMENT] TcpListener sets SO_REUSEADDR by default
