Remove duplicate story.
Add story placeholders for support for new plugin mechanism support for Gradle, and Settings objects in a build.
Add placeholder story for continously testing Gradle against the real plugin portal code base.
Spec updates after REVIEW-4621.
Remove duplicate story.
Further refinements to address REVIEW-4583.
Break up dedicated HTTP client, implying it in implementation of other stories.
Bust up the stories into milestones.

Milestone headings denote that all nested sections belong to that milestone, not that milestone has been reached if previous story is complete.