Standardise the circle.yml we use.

circle.yml

@@ -1,13 +1,18 @@
 ---
 
+machine:
+  environment:
+    TERM: dumb
+
+checkout:
+  post:
+    - "if [ -e .git/shallow ]; then git fetch --unshallow; fi"
+    - git fetch --tags
+
 dependencies:
   override:
-    - ./gradlew --refresh-dependencies dependencies
+    - ./gradlew --parallel assemble
 
 test:
   override:
-    - ./gradlew --refresh-dependencies check -x findbugsMain -x findbugsTest
-
-general:
-  artifacts:
-    - "build/reports/tests"
+    - ./gradlew --stacktrace --parallel test