Simplify testing commands using a Makefile

circle.yml

@@ -3,8 +3,8 @@ dependencies:
     - sudo add-apt-repository ppa:jonathonf/vim -y
     - sudo apt-get update
     - sudo apt-get install vim
-    - bash test/install.sh
+    - make dependencies
 
 test:
   override:
-    - vim -u test/vimrc -c 'Vader! test/*.vader'
+    - make test