Renamed test target to coverage, added test target for local testing

.travis.yml

@@ -12,7 +12,7 @@ before_install:
   - go get github.com/go-playground/overalls
 
 script:
-  - make test
+  - make coverage
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)

Makefile

@@ -7,6 +7,10 @@ mumbledj: ## Default action. Builds MumbleDJ.
 
 .PHONY: test
 test: ## Runs unit tests for MumbleDJ.
+	@env GO15VENDOREXPERIMENT="1" go test $(dirs)
+
+.PHONY: coverage
+coverage: ## Runs coverage tests for MumbleDJ.
 	@env GO15VENDOREXPERIMENT="1" overalls -project=github.com/matthieugrieger/mumbledj -covermode=atomic
 	@mv overalls.coverprofile coverage.txt