test: golden file for events

- all events of cs-demos/default.dem are logged
- at the end of the test we check the logged events against test/default.golden

Author: markus-wa

.gitmodules

@@ -1,4 +1,4 @@
 [submodule "cs-demos"]
-	path = cs-demos
+	path = test/cs-demos
 	url = https://gitlab.com/markus-wa/cs-demos
 	branch = master

.travis.yml

@@ -30,7 +30,7 @@ before_script:
   - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $GOPATH/bin v1.16.0
 
   # Download test data
-  - pushd cs-demos && git lfs pull -I '*' && popd
+  - pushd test/cs-demos && git lfs pull -I '*' && popd
 
 script:
   - go build ./...

README.md

@@ -166,7 +166,7 @@ To run tests [Git LFS](https://git-lfs.github.com) is required.
 ```sh
 git submodule init
 git submodule update
-pushd cs-demos && git lfs pull -I '*' && popd
+pushd test/cs-demos && git lfs pull -I '*' && popd
 go test
 ```