Trying to work around issues that fail travis CI

403 responses from GitHub
Merge branch 'master' into go_port

Conflicts:
	Makefile
Use Langohr 1.4.x
Merge with upstream

Conflicts:
	clojure/project.clj
Port tutorial 1 to Go
.gitignore for Go tutorials
Port tutorial 2 to Go
Refactor error handling
Refactor tutorial 2
Port tutorial 5 to Go
Port tutorial 4 to Go
Port tutorial 2 to Go