Fix TargetManager & start using scala 2.10.2
Report error when dep config load failed.
Default config for configref verify dispatcher.
Cache result in BatchResponser.
Impl TargetBuilderImpl.
Define enum for target status.
Use meta to determine if need build target or not.
Add require for defineTarget cmd.
Add assert in Target.
Cleanup legecy target/TargetManager.
Add EmptyMetaFn.
Fix assert in Target.build
Export target related type in Dsl.
Eat error in Meta#fromBytes
Add assert in BatchResponser.
Shutdown actorsystem and quit.
Only report one error on dep future failed.
Add TaskBuilder for Runnable.
Only mark task done on success in config loader.
Trigger checkDag again after pop first avaliable