Allow Gradle dependency resolution like Maven does

[xjusko]

Maven allows

Maven.resolver().resolve("G:A:V").withTransitivity()

Maven.resolver().resolve("G:A:V").withoutTransitivity()

Maven.resolver().resolve("G1:A1:V1", "G2:A2:V2").withTransitivity()

etc.

Gradle can only resolve the whole project, which takes a long time. This is useful for adding test dependencies like AssertJ that aren't included in the deployment like Junit's assertions and that can otherwise not be used.