Implement alternative resolvers

This commit also
- requires Dependencies to explicitly implement canBeCached
- unifies some logic for dependency downloading
- moves SBT-like dependency DSL into its own trait
- error message showing build directory for exceptions in builds
Not splitting this up in favor of faster progress to 1.0.

The user facing API can probably be slightly improved using implicits
inside of BasicBuild, but we can do that later.

1 files changed, 10 insertions, 8 deletions

diff --git a/README.md b/README.md
index 36f1f50..84259da 100644
--- a/README.md
+++ b/README.md
@@ -48,14 +48,16 @@ class Build(context: cbt.Context) extends PackageBuild(context){
   override def version = "0.6.1-SNAPSHOT"
   override def groupId = "org.cvogt"
   override def artifactId = "play-json-extensions"
-  override def dependencies = super.dependencies ++ Vector(
-    // encouraged way to declare dependencies
-    ScalaDependency("com.typesafe.play", "play-json", "2.4.4"),
-    JavaDependency("joda-time", "joda-time", "2.9.2")
-    // also supported for SBT syntax compatibility:
-    // "com.typesafe.play" %% "play-json" % "2.4.4"
-    // "joda-time" % "joda-time % "2.9.2"
-  )
+  override def dependencies =
+    super.dependencies :+
+    MavenRepository.central.resolve(
+      // encouraged way to declare dependencies
+      ScalaDependency("com.typesafe.play", "play-json", "2.4.4"),
+      MavenDependency("joda-time", "joda-time", "2.9.2")
+      // also supported for SBT syntax compatibility:
+      // "com.typesafe.play" %% "play-json" % "2.4.4"
+      // Maven.central % "joda-time" % "joda-time % "2.9.2"
+    )
   override def compile = {
     println("Compiling...")
     super.compile