Adds Coursier and Travis Cache (#255)

* Adds coursier and Travis Cache
* Empty commit for testing purposes
* Disables coverage flag once tests are finished
* Removes .ivy2 from cache travis section
* Brings back .ivy2 to cache section in travis file

.travis.yml

@@ -30,3 +30,20 @@ script:
 after_success:
 - sbt ++$TRAVIS_SCALA_VERSION orgAfterCISuccess
 - bash <(curl -s https://codecov.io/bash)
+
+cache:
+  directories:
+  - $HOME/.sbt/0.13
+  - $HOME/.sbt/boot/scala*
+  - $HOME/.sbt/cache
+  - $HOME/.sbt/launchers
+  - $HOME/.ivy2/cache
+  - $HOME/.coursier
+
+before_cache:
+- du -h -d 1 $HOME/.ivy2/
+- du -h -d 2 $HOME/.sbt/
+- du -h -d 4 $HOME/.coursier/
+- find $HOME/.sbt -name "*.lock" -type f -delete
+- find $HOME/.ivy2/cache -name "ivydata-*.properties" -type f -delete
+- find $HOME/.coursier/cache -name "*.lock" -type f -delete

project/ProjectPlugin.scala

@@ -69,7 +69,8 @@ object ProjectPlugin extends AutoPlugin {
         (compile in Compile).asRunnableItemFull,
         (test in Test).asRunnableItemFull,
         (ScoverageKeys.coverageReport in Test).asRunnableItemFull,
-        (ScoverageKeys.coverageAggregate in Test).asRunnableItemFull
+        (ScoverageKeys.coverageAggregate in Test).asRunnableItemFull,
+        SetSetting(coverageEnabled in Global, false).asRunnableItem
       ) ++ guard(scalaBinaryVersion.value == "2.12")(
         (tut in ProjectRef(file("."), "docs")).asRunnableItem),
       resolvers += Resolver.sonatypeRepo("snapshots"),

project/plugins.sbt

@@ -1,2 +1,3 @@
 resolvers += Resolver.sonatypeRepo("releases")
-addSbtPlugin("com.47deg" % "sbt-org-policies" % "0.4.17")
+addSbtPlugin("com.47deg"       % "sbt-org-policies" % "0.4.18")
+addSbtPlugin("io.get-coursier" % "sbt-coursier"     % "1.0.0-RC1")

project/project/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-RC1")