Add change notes and sign binary files (#22)

CHANGES.md

@@ -0,0 +1,16 @@
+Changes by Version
+==================
+Release Notes.
+
+0.1.0
+------------------
+
+#### Features
+- Add command `swctl service` to list services
+- Add command `swctl instance` and `swctl search` to list and search instances of service.
+- Add command `swctl endpoint` to list endpoints of service.
+- Add command `swctl linear-metrics` to query linear metrics and plot the metrics in Ascii Graph mode.
+- Add command `swctl single-metrics` to query single-value metrics.
+
+#### Chores
+- Set up GitHub actions to check code styles, licenses, and tests.

Makefile

@@ -107,4 +107,6 @@ release-bin: build
 
 release: verify license release-src release-bin
 	gpg --batch --yes --armor --detach-sig $(RELEASE_SRC).tgz
-	shasum -a 512 $(RELEASE_SRC).tgz > $(RELEASE_SRC).tgz.sha512
+	shasum -a 512 $(RELEASE_SRC).tgz > $(RELEASE_SRC).tgz.sha512
+	gpg --batch --yes --armor --detach-sig $(RELEASE_BIN).tgz
+	shasum -a 512 $(RELEASE_BIN).tgz > $(RELEASE_BIN).tgz.sha512