Merge pull request #807 from olafurpg/cache

Cache all of $HOME/.sbt

Author: olafurpg

.travis.yml

@@ -28,9 +28,7 @@ jobs:
 
 cache:
   directories:
-  - "$HOME/.sbt/0.13/dependency"
-  - "$HOME/.sbt/boot/scala*"
-  - "$HOME/.sbt/launchers"
+  - "$HOME/.sbt"
   - "$HOME/.ivy2/cache"
   - "$HOME/.coursier"