Remove render-cli binary from source control (#260)

Dev binary was committed as a convenience but goes stale quickly.
Official builds use GoReleaser; local builds can use `go build`.

Author: metonym

.gitignore

@@ -1,2 +1,6 @@
 .idea
-*.iml
+*.iml
+# binaries for local testing
+render-cli
+render
+cli