Improve the Makefile commands

This also gets rid of one step in the CircleCI configuration.

Author: arichiardi

.circleci/config.yml

@@ -5,7 +5,6 @@ default: &default-steps
   steps:
     - checkout
     - run: apt-get update && apt-get install make
-    - run: make elpa
     - run: make test
 
 # Enumerated list of Emacs versions

Makefile

@@ -1,9 +1,19 @@
-version:
-	emacs --version
+.PHONY: clean version test
 
-test : version
-	cask exec buttercup -L .
+all: build
 
-elpa:
+clean:
+	rm -rf .cask
+
+.cask:
 	cask install
 	cask update
+
+version:
+	emacs --version
+
+build: version .cask
+	cask build
+
+test: version .cask
+	cask exec buttercup -L .