Simplify Travis build

.travis.yml

@@ -19,6 +19,3 @@ script:
 before_install:
   - gem install asciidoctor
   - sudo pip install docutils
-install:
-  - go get github.com/stretchr/testify
-  - go get -v ./...

Makefile

@@ -35,7 +35,7 @@ docker:
 	docker rm hugo-build
 
 
-check: fmt vet test test-race
+check: get fmt vet test test-race
 
 cyclo:
 	@for d in $(DIRS) ; do \
@@ -56,6 +56,9 @@ lint:
 		echo "^ golint errors!" && echo && exit 1; \
 	fi
 
+get:
+	go get -v -t ./...
+
 test:
 	go test ./...